I have an AT oc9 ml iii, a denon dl-305, dl207, dl103 and also 301 mk ii. Throw in some dynavectors....a 10x4 and karat 17d2mr. I listen to all of them and like all of them. I am more inclined to listen to the LOMC cartridges when listening to jazz, balladeers (Leonard Cohen), lighter rock and classical. I think that this can be very system specific. I have a decent system. I wouldn't classify it as "high-end", but it is good enough for me to appreciate a good LOMC cartridge. I rotate turntables in and out of my systems and am currently loving the Tannoy/Micro TM55DD turntable that I have hooked up. It does dictate, to me anyway, that the LOMC cartridges sound better. This table runs dead silent, has a non-existent sound floor, and is my favorite turntable. The price point of the LOMC cartridges that I play would logically make one think that they are better than the MM cartridges that I have. I would tend to agree with that assessment, but will add that I have some MM cartridges and a piezo-electric Micro Acoustic MA-2002e that give the LOMC cartridges a serious run for their money, and come in at a much lower price point.
I had an Audio Technica AT 160ML that sounded every bit as good as most of the LOMC's that I have except perhaps for the AT OC9/ML iii, the Denon DL-305, and the Dynavector karat 17d2 mr, and it gave them a run for their money. When you throw in the cost of an SUT to allow you to play your LOMC's through your phono stage, (okay...I have a LesBox modified Yaqin MS23b phono stage that I have to use an SUT with), you are talking about some significant coinage. I purchased the AT160ML a few years ago from Stereoneedles.com.....got it for a relatively reasonable price. I loved that cartrdge and am still weeping about accidentally destroying it a few weeks ago. Amazing sound across the board....detail...midrange....bass...separation and soundstage were all excellent. I am listening to an AT 150MLX now, but it is not as good.
I have a Shure V15 type iii with a NOS vn35he stylus that is an absolutely wonderful cartridge. It came on the Tannoy/Micro turntable when I purchased it. It is dynamic and detailed and I love it for Rock music especially, although it is a very versatile cartridge and can play anything well. I also have a Shure V15RS with a Jico SAS vn5xmr stylus on it that is truly amazing. It is sweet and detailed and was a true bargain. I got the cartridge for virtually nothing and the stylus was 180 shipped. For the money it is absolutely amazing.
The Micro Acoustic MA-2002e came in at about 250 dollars and the stylus is NOS. I had heard about this cartridge but never thought that I would lay my hands on one and I simply got lucky and found it on a website after googling and trying to locate the stylus. It was listed as just the stylus but I was shipped a cartridge and stylus when I ordered it. That cartridge makes me feel less sad about destroying my AT160ML. I absolutely love it. There are also some fine Empire MM cartridges out there that are very under appreciated.
I guess what I am saying is....a really good LOMC will probably perform better than a really good MM if you have the system to support it. As far as bang for the buck...I think a really good MM cartridge is a better value and will perform at a level that is very close to that of the LOMC for a lot less money. It is also nice NOT to be a nervous wreck when swapping cartridges in and out. The LOMC cartridges that I have make me a bit nervous....not gonna just get a new stylus for an LOMC unless you are talking about retips.
Just my 2 cents.....I am very happy to listen to my Shure v15, Shure V15Rs , AT150MLX , Signet TK9, and not be stressed about breaking anything....and by the way...they sound really, really good to me as well.
I will say that initially I purchased MM cartridges exclusively. I only went to the MC cartridges after doing some reading and then puchasing the ubiquitous Denon dl103 and dl110 cartridges. The DL110 piqued my interest enough to start aiming a bit higher. The Denon DL 103 produces amazing sound for a conical stylus...it really rocks.
I think that I have reached the limit as far as what I am going to spend on LOMC cartridges as I believe that I am at the point of "diminishing returns" where I am never going to have a system that is going to be able to display the nuances that purchasing a really expensive LOMC cartridge might bring forth. I am pretty happy with what I have and can neither afford nor justify spending more without selling some of what I already have. The Dynavector Karat 17d2 MR is about as far as I am willing to climb up the price chain.