It's too late for my wallet.
I've owned a few mechs, but I have yet to try a lot of switches and customization. So far, I've used:
IBM Model M 71G4644 (rubber dome from 1995)
daskeyboard 3 (mx blues)
CM Storm QFR-i (mx browns) - Didn't get much use out of its backlighting, it's now fitted with a Ducky PBT blue/grey set
Pok3r (mx browns) - Splurged on Dolch DSA on the recent return to pimpmykeyboard and wanted a nice 60% to go with
Now I'm awaiting the arrival of my first Topre experience, a Realforce 87u, 55g uniform. Hopefully I find it as enjoyable as some others have expressed, although I have read an equal amount of hate towards Topre. I'll have to judge it for myself.
..I've already placed an order for one of martinyeah's 70's colors three-tone caps, to put on my Realforce, and it's not even here yet!