I recommend the PT 1911, it offers the most bang for the money, comes with a forge slide ,forge frame,(emphasis on forge) stainless match barrel, completely enhanced, and it's under $650.
Heinie Straight Eight sights (current models come with Novak sights)
Checkered 30-lpi trigger guard, mainspring housing, and frontstrap
Beavertail grip safety with memory pad
Polished throat and feedramp
Lowered and flared ejection port
Custom internal extractor
Extended magazine release
Beveled magazine well
I've put over 18K reliable rounds through mine, with all the original stock equipment, and I highly recommended it. Love it.
shoot safe, shoot straight, and have fun.