With 7k-8k, you have a lot of options. Here would be my thought process:
1) Would I get more enjoyment out of one pin or multiple?
2) What is the best pin (or pins ) I could get?
3) How much does newness/low plays matter to me?
I cannot answer those questions for you...only you can, but here is what I would suggest:
If it were me, I would have more fun with 2 or 3 (or more), instead of 1...so I would make a list of my favorite pins. For instance, I love medieval madness, but for the same price I could get a flash Gordon, paragon, the shadow, and a pinbot...i would MUCH RATHER have those.
I would recommend "bang for the buck" pins or ones that are under priced. There are lists on pinside threads, on the pinside top 100 custom settings, and on the internet. These will depend largely on your tastes, of course, but older pins tend to have a much better bang for the buck...so finding restored/pristine/huo examples is the best of both worlds. For 7-8k, you could easily get 7-15 EMs, 5-10 early SS pins, 3-4 great Williams system 11 games, 2-3 early dmd games, 2 newer "b" titles or lower priced games, or just 1 new game.
Some underpriced titles I would suggest are paragon, pinbot, high speed, the getaway, judge dread, fish tales, revenge from Mars, world cup soccer, taxi, flash Gordon, 8 ball deluxe LE, stargate, nba fastbreak, black hole, etc.
TOM costs around 7k already...but for that, you could have multiples that would probably hold your interest longer. Home games are way different than games on route because depth and variation starts to become EXTREMELY important.
Next, you can ask how good of condition can you get them in. A lot of people fix up early SS and Williams system 11 games...so finding a really nice example often isn't a lot more than just a "players quality" game...plus they are fairly easy to work on if you need to down the line.
Newness of a game doesn't always equate less trouble-shooting. Poorly made new games will break down as easy as extremely well kept older games. You will eventually have to do some maintenance regardless.
If TOM is far better than owning 2-5 games for you, then I would go for it. It likely won't be, however...it isn't for most collectors. If you decide on multiple games, get the best bang for the buck pins. Get the best examples you can get. Use the top 100 list to get an idea of what others like compared to you, along with what will hold/increase in value.