Kerr, if possible, consider getting some discontinued/rare models.
Al Di Meola humbucker (Like duh who used it)
Multibucker (Fast track 1 & Chopper in 1 humbucker, great for those who want single coil tones)
Double Whammy (Vinnie Moore used this in both neck and bridge positions in his signature Ibanez, ridiculous chug despite medium output)
Bluesbucker
Steve Morse model (neck & bridge)
Eric Johnson models (neck & bridge)
Mo'Joe (new Satch model)
D-Sonic 7
X2N-7
And maybe some Virtual Vintage series for the old school crowd, lots of hype about them...