I really like the SSL-1 set for that glassy Strat sound. In my Ash Strat, I needed a bit more warmth, so I left the SSL-1in the bridge because I like the bite and power, but put the APS-1 in the neck and middle. I did try an SSL-3 and a SSL-5, but they were too hot, for me, to balance with either kind of neck and middle pups I had.
One suggestion regardless of what you choose, go with flat pole pieces. That's the one thing I would change.
Oh, and I don't think you're getting ripped off on your guitar, so don't pay that nonsense any attention. Consider the source. I'm looking forward to seeing the finished result!!