Welcome to the mac world and forum Collin...
Its the second most expensive item I have ever bought except for my house.
Even though you bought from a store and have peace of mind with warranty you have to understand McIntosh. I'v never sold any mac gear for less than I paid and this is generally for buying used in the first place. Used equipment follows the price increase of new gear so it holds it's value and or goes up. This is true even for newer gear in current production that generally last 10 years a unit, but will increase MSRP over that time. I bought my MC275s new at a local store and paid local tax as well. At first as soon as I bought them if I needed to sell I would have taken a $1000 loss per amp. Well after a little over three years use, and a McIntosh increase in price over that time, I'll only have a $500 loss per amp. So lets say If I sold a MC275 It really only cost me $500 to enjoy new mac gear for three years. Of course this was for new gear and the longer you own it the better off you are. But buying used is a whole other story, and it actually only goes up and you don't have the initial loss at all.
Do I need new speaker wire? do I need better interconnects? This is my first time entering this world and I'm excited, scared, nervous, worried, etc, etc.
I think your going to want to set your new gear up with just as good of quality and ascetics as the mac gear.
I will try the pair with Klipschorns, AR3a's, ADS L1290, Klipsch KG4, KLH 5, KLH 33, NLA, OLA's, and JBL L88's to name just a few
You just entered a new audio world and this kind of buying on the weekends will change. As your system/components get better and cost more, what we drag home to try has to come close or better than we already have, and that cost will be a lot greater.
I'm at the financial standpoint where I can afford to send them in for restoration.
Well this is the time we make a move on things like this, but you have options and to many speakers. I think you would benefit stepping up your speaker game and selling off what you accumulated, this will only help the end result in your new system.
Ok lets talk crap in crap out and I know you like records.......
I spent money chasing SQ on vintage Japanese gear and common consumer equipment. I spent a small fortune on the beginnings of my mac system but still had all the same type of tables and cartridges. In fact I'd get a new table to try and then use my old cartridges on the new tables. This was all a futile effort and a sideways move at best.
Even after buying some of my Mac system I was still searching for SQ, well until I stepped up my game in turntables, arms, cartridges and staging. I came home with a SOTA Star deck and ended up swinging a deal with the seller for his SME 309, and Sumiko Blackbird. As soon as I was done setting it up and put a record on, it hit me.....I found it, I'm done chasing SQ.
When I added a head amp between the table and my preamp it really opened up my sound stage. I also ended up buying another Sumiko cartridge, the less expensive Blue Point EVO III to put on my much cheaper table. To tell the truth as far as SQ goes it was very close at a far far cheaper price.
And one other point, Records are the other half of your system and any high quality cartridge and turntable setup. Once you get the main body and front end of the system setup, and you have some records that sound like magic. The focus should be on finding the best copies made to play on your system.
Today my system stays pretty much the same, I swap in nice speakers here and there but really spend my money on very good records.