The incredible is a Nexus with the exception that its running senseui, on the verizon network and its screen is slightly more accurate.
The Droid X, I think is the best phone out there. Its GPU is much better then anything that is out there, has more storage (8gb internal + 8gb SD card). It's screen is gorgeous and large enough that watching videos is great but its not too large to be an issue holding it.
I do think the N1 and incredible, are top tier phones, but the improvements the DX has, leap frogs both phones.
The downside? Moto has locked the phone down with an encrypted bootloader making it impossible to load a custom rom. The eFuse component will reject any non-moto signed Roms as well, forcing the phone into recovery mode until a proper rom is installed.