I went through this about a year ago, and I've learned a lot since then. My final conclusion was that the DW Patriot, Springfield Loaded and Para Ordnance SSP were functionally equivalent. All were well built, well equipped with the kind of "upgrades" you want (combat sights, beavertail safety, lowered and flared ejection ports, etc.), and with street prices in the $600 range. I couldn't really find any significant performance/reliability difference in them.
Kimbers ranked about the same in terms of quality, features, reliability, etc., but tended to run about $100-200 more than the DW, SA and Paras that were similarly equipped. That was in Memphis as of a year ago, anyway. Kimbers are very popular here, so that may not be representative of where you are.
Below the Kimber/Para/SA/DW lines are various imports that are cheaper, but they tended to lack features I cared about or were notorious for reliability problems. I decided to stick with a brand name that had a good rep, even if it cost me a bit more $. Above those brands you get into the various semi-customs that start around $1,000 and go up -- way up. I'm sure they're great, but weren't what I was looking for.
I ended up buying a Para Ordnance SSP for just under $600 (I think the price was $569 plus tax, but don't hold to that exactly). It's been great. With quality mags (Wilson and CMC), it is 100% reliable and very accurate. POI at 25 yards with cheap PMC ball is 1 inch below POA, and windage is dead on. I shoot everything from HP to ball to LSWC, and it feeds and ejects everything perfectly. The trigger broke crisply at 4-1/2 pounds out of the box, and is adjustable for overtravel. Eventually I'll have it lightened up a little, but that's not bad for a factory trigger. About the only thing I don't care for is the full length guide rod, but I haven't bother to change it out (I did on my CCW 1911 for the weight savings). More on the Para traditional 1911 line is here:
http://www.paraord.com/product/category.html?cat=10