Yeah... I'm a teacher, so I will never be able to afford an STI...
As I have said before, I know that my opinion is biased, but you WILL NOT be disappointed with a CZ. I own poly and steel CZs (will own an alloy framed here in 16 days!), and you just can't go wrong. You mentioned the frame bulge, I think. That is something that may or may not happen. I got the impression that that happens with the .40 S&W and not the 9mm Para, but I could be wrong. I almost got the P-07 instead of the SP-01, but I have been lusting after an SP-01 for a while now. The P-07 will be next, unless I get the 412 Utility, but don't get me started there.
Sorry, I'm rambling. I've been teaching all week... But if you can get a P-07 for ~$410 and save $220+, I think you will love it. The P-07 will not compare to an STI Race 1911, but I WOULD put my 75B up against someone with my skill set against an STI race gun. If STI is only importing these but not putting the same care into them that they do their 1911s, then it's just like a Glock with a designer tag. The CZ comes with nearly 100 years of history, innovation, and small arms mastery behind it, along with some of the BEST customer support and aftermarket custom work there is. And finally, consider that the P-07 is the chosen duty sidearm of more than a couple police forces, government protection agencies (Think European Secret Services), and special operations agencies. They are tried, tested, and approved, and will do you proud!
Ok. I'll stop wasting your bandwidth now...