If I suddenly had the money? I'd give the preamp a shot at staying in the new system and see how it stacks up. I think the Gyro would stay but I'd upgrade the motor, PSU, arm, cart, and might try out the "unsprung" mod because I would opt for some serious isolation platforms for the whole system. Everything else would go to a bedroom system in favor of new stuff and I'd go hog frickin' wild upgrading the speakers and cables :p Not to mention buying a shite TON of new music!
Of course I would have the room redesigned and rebuilt and it would sound incredible. I still can't believe some of the people that will put a zillion dollar system in an untreated room, it's no wonder they're always upgrading!
And of course balanced isolated power on a dedicated circuit, though I plan on doing this when I have a house, anyway.
Fun thread, I'll try not to get depressed thinking about what I *could* have ;) Who knows, I could get lucky. Then again, I'm only 23--I could start saving now, LOL.