First and foremost I would love to get an Axe-FX unit from Fractal Audio. They are supposed to sound stunning!

Here's some more info on their website:
Fractal Audio's Axe-FXI would also love to get a classic Soldano SLO-100 tube head or possibly and Engl. They are amazingly clear sounding amps!
I also really want a Roland VG-88 guitar synth. Who says the keyboardist has to have more fun? Now you can add a massive variety of high quality instruments to your playing.

A few Eventide harmonizers would kick a** too! James Murphy style! Anyways, I'm getting carried away! I just wish I could afford to build the ultimate, high-end setup and be done with it!