I voted RIA so you'd have some money left over for ammo so you could actually shoot it.
IMHO Colt has been living off their reputation for a long time, but its still the one to buy if you think you might sell it later.
Para, IMHO the LDA trigger is a solution looking for a problem. The double stack guns suffer from having crammed too many rounds in the mag for SD adequate reliability, although 14+1 does rock at the range were the every few hundred round feed failure is not biggie. Their "normal" 1911s are OK but I don't like the non-standard "PxT" extractor. I've very few Para double stack mags that have worked 100% out of the wrapper.
S&W, same issue, the external extractor means a trip to the factory when it breaks (on any gun, after the recoil spring the extractor is the next most likely thing to break).
I really like the fact I can keep a 1911 internal extractor in my range bag and replace it at the range should it break. I've done two, one on a Colt, the other a Charles Daly, both about 8000 rounds, My oldest RIA has about 13,000 rounds and the original extractor is still doing right, although I''ve replaced several recoil springs and firing pin springs and the link broke at about 3000 rounds. ($5 replacement). My newest RIA Tactical has been 100% but hasn't quite hit the 5000 round mark yet.
RRA I've no experience with, don't like the price. People seem to like the Springfield's, I'll likely get one eventually, but the RIA Tactical offers Springfield "Loaded" features at a bit under "GI" prices.
STI Spartan is a "glorified" RIA and should be on your list as its only a little more than the RIA and supposedly has better STI internal parts.
The bottom of the line "Custom" Kimbers are pretty good value, although beyond that you are paying for style IMHO. So far everyone who has shot my Kimber TLE A-B with my RIA Tactical has immediately said the Kimber is nowhere near 2X better, and half actually prefer the RIA (probably for lack of "series II" firing pin block).
Taurus, I'm waiting for the reasonably priced 9mm 1911 they've promised.
--wally.