I've always thought the NX 01 is one of the better looking ships, very streamlined and rugged. Definately better than ENT E - Defiant and Voyager.
It looked good. Definitely better than the Defiant (totally non-Trek design), Voyager (atrophied little nacelles) and the Enterprise-D (pleasure yacht)
It looked more solid and sturdy than the original TV series (fragile) and I-VI movie Enterprises (paper-thin nacelle struts and connecting dorsal) although it's not as aesthetically pleasing or distinctive as either, IMO.
I love the Enterprise-E design, especially the Nemesis
version, with it's slightly raised nacelles.