What if I don't wanna stick to PMDG?

Hi Folks,It seems like the only decent flight model for a B737NG and FS2004 is PMDG's. Is that so?What if some of us don't wanna go with PMDG, 'cause we don't want to buy no'more, or because we don't wanna be limited trying to interface the flight model and our sim's hardware?I'm seeking for a useable Boeing 737-700/800 flight model that I can use in my sim. I have found some models for FS2002, but none made specifically for FS2004. Anyone knows of any?Thanks all for your input.