Re: Help me choose a middle and neck pickup
Given use of only neck & bridge for most part, I'd look at an STK-S7 Vintage Hot Stack Plus for the neck, and an STK-S4m Classic Stack Plus (RW/RP) in the middle. Lets you do coil splits for 2+4 positions if you want, while keeping noise cancellation.
STK-S7 should be fat but not dark, great for SRVish neck tones without having to resort to girders instead of strings. Should balance well with the hot bridge pickup, while still sounding stratty.
STK-S4 is the hum-cancelling stacked humbucker take on the SSL-2 classic strat pickup (which is the flat version of the SSL-1, which has been used by greats like David Gilmour in the middle & neck).
STK-4 & STK-S4m (m in middle again) would work fine, if you want traditional output singles in both positions. Again, don't absolutely need one RWRP, but just like with conventional singles, I prefer to have the additional noise cancelling options.
I'd avoid the Duckbucker myself, I don't think it sounds as good as an SSL-1/2--which I wont use because of the noise, but I play around annoying fluorescent buzz emitters too much, so I go for the Stack Plus line.