Ok, so you convinced me, and I convinced my wife. My left testicle is officially living on borrowed time. I figured I could get it, do a comparison, and then just sell the one that I like the least.
I know a fair amount about turntables, but I still have a lot to learn, so I thought I'd post some of the major things that I notice about each table and hear your comments.
First the systemdek:
The sound is superb! The AT-160ML nude micro linear cartridge that came with it could be a very big contributing factor to this. I am running an older ADC XLM MK III which of course is a fantastic cart but not quite to the level of the AT-160ML.
I can hear the motor running. This is one of the first things that I noticed. It is not loud, in fact I have to place my ear close to or on the plinth to hear it, but it is audible. This table is also a very low use table so this is not a question of bering wear. I have also noticed this in several new turntables that I looked at this weekend while at an electronics store. Especially the new Project turntables. I can hear them the instant they are turned on without even trying to listen for it. Maybe this is normal for belt drive turntables and I am just unaware, but it doesn't seem like a good thing to me.
For those of you who have belt drives, place your ear near or on your plinth and switch your turntable on, and see if you can hear it. Again, it's not loud at all but if you can hear the difference between on and off then it's there.
The suspended subchassis is difficult to get used to, and I'm not totally convinced of it's usefulness. This is not because i don't believe in suspended chassis turntables, it is because i don't think that using a steel spring is the right way to do it. although I'm sure that there are frequencies that will be cancelled out on the steel spring i feel like they are also some that would be just as happy to travel right up that spring to the subchassis. If your know more about this that I do, please enlighten me.
Now the KD-550:
The stock arm tracks better than the Profile arm.
The table is completely silent, and I mean silent. I can't for the life of me hear a thing when I turn it on.
It gets up to speed much faster.
It also sounds superb!
All in all they are both fantastic tables and I am having a hard time deciding, but I am leaning more toward the KD-550. Maybe I need to know a little more about belt drives and suspended subchassis before I can make my decision.
I would love to hear more of your comments.