It is widely known that a lower MP camera can significantly outperform higher MP cameras, especially on phones (iPhone is a perfect example). To my knowledge, we haven't seen many (if any pics) to judge the performance of the actual camera. I would wait for evidence before stating 'sub par'.
Also, the resolution and pixel density on this phone is very, very good. Putting it on a 4.3-5' display would lower the density and make it look worse. In this regard, you are looking for a phone that doesn't currently exist (again, to my knowledge). All the 4.3-5' res phones currently on the market look worse than the atrix.
Maybe later this year or next you will find the phone you are looking for. In the mean time, I would suggest the atrix, bionic in Q2, or the reported 3d phones being announced at MWC. Still, the atrix will give you PLENTY of longevity until technology catches up with your expectations.