personally, i'd go railed. that's what i did with my latest 1911 purchase. i came up with a list of requirements then found the gun(s) that matched the criteria.
my requirements:
1- aluminum frame
2- accessory rail
3- commander length
4- REPUTABLE MANUFACTURER
5- Night Sights
that came out to a very short list: SIG and Kimber make commander size 1911s with rails, but they are steel framed. Springfield Armory was the only option
i bought (back in Feb) a SA Lightweight Champion Operator, and haven't looked back!
i have since upgraded a few parts: Nighthawk One-Piece mainspring/magwell. 10-8 flat trigger, removal of ambisafety, VZ Operator II grips, Wilson Combat Bulletproof sear, hammer, disconnector, extractor, and a serious trigger job. the trigger is at 4lbs 3oz, with nearly no creep and an almost unmeasureable overtravel. and yes, i've done all the work myself.
the list of things left to do are relatively short: checker front strap, countersink the takedown pin, serrate the top of the slide, and then refinish at RoBar with NP3+
after the upgrades i've already performed, it's around $1,200. not horrible for a 1911, and not nearing the Wilson Combat or Nighthawk Custom prices for a comparably equipped semi-custom gun