I've just started my build with Alpher Instruments, it's extremely exciting isn't it?
I opted for the John East simply based on two things. The first being that it is an extremely good preamp and is very versatile. The second being that nothing is permanent! It can take more than just a few minutes to decide that you prefer a certain preamp, so I was happy with it knowing that if I really had experience with another preamp that I preferred, I could switch it. I have no doubt though that it will do what I want it to do.
I opted for two humbuckers because I prefer humbuckers! It's as simple as that. Wizard pickups are rather sought after and quite rare on the second-hand market, that's all I know about them, but it speaks volumes to me!