I already shoot in production and do okay. I'm not planning on switching in the near future but I have always wanted a 9mm 1911 and I will not buy one that isn't decent for ipsc.
Well MR.Op, you have alot of choice ahead of you. Don't bother with safteys, just go for a wide paddle or sheild(double tap)
Buy whatever floats your boat.
If it locks up tight, you'll have a shooter.
Personally, no sig or smith i've seen has locked up tight, but they still shoot straighter than any ipsc guy would need. My definition of tight literally means you have No movement between slide/frame with a closed chamber.
Sti is most popular by large in classic. What a springer RO is compared to an STI is absoultly F-all for an 700$ price difference.
No matter what, you'll do a trigger job to any 1911 unless you start at 2500+.
I'm sure the law of diminising returns occurs around the $1400 mark.
Sti, springfield and colt all make the Best frames in a 1200-2000 pricepoint.
Those are in my opinion your best value per dollar.