Price is the biggest factor.
Here is a link for you just to check out what is out there.
http://www.freetimehobbies.com/index.asp
There is the Tamiya USS Enterprise Carrier on there for about $170.00.
If you just going OOB then I would say any of the Tamiya's are your best bet.
Although Trumpeters 1/350 series is a close second ( the Battle ship catagory) IMHO
hope this helps
Paul