If I were you I'd keep the drum brakes in back and do this a step at a time. I think the rear drums provide much better initial bite than a complete SVT package, I've driven both extensively. They're a pain in the ass to replace components but they provide for better overall braking than an SVT setup.
I don't know what to blame on my car, but it's braking kind of sucks and always has. No initial bite to speak off. For some reason I can't explain it only does around 15" vacuum at idle (versus the oft mentioned 18") and this is directly proportional to what the brake booster gets at speed, so that may be my problem. I've also never replaced brake fluid and that could help (still only 74K miles). I also don't really believe braided stainless lines contribute much to brake feel, all factory lines are steel braided inside the rubber and I think the stainless brake lines are generally more for aesthetics.
SVT spec brakes are still prone to noticeable fade with hard use, I cooked the shit out of my brakes on some rural WI hill roads about a month ago when I had new rotors and pads already on order and didn't care.
EDIT: wrote this before I saw how much you hate rear drums. I say learn to love them, they really stop a car well.