You need to find a saw with the most stable fence that you can find. Almost ANY saw manufacturer sells a kit to expand the table or cutting plane, but the fence is one thing that you cannot easily upgrade later. (Motor is the other.)
They may be seen as pedestrian, but I still find that Craftsman table saws do a good job, provided that you have the proper blade and get one with a stable base and a good, high-quality locking fence.
The last time I was in there, they had one with a dent in the doors that are at the base of the table. $275 for a $550 saw.
Quite pimp, for the cost:
http://www.sears.com/sr/javasr/product.do?cat=Bench+Power+Tools&pid=00922104000&vertical=TOOL&subcat=Table+Saws&BV_UseBVCookie=Yes
More pimp, slightly cheaper:
http://www.lowes.com/lowes/lkn?action=productDetail&productId=159372-46578-C10FL&lpage=none
One other thing- you can get roller stands to help carry the weight of large boards. 2 or 3 of these can really make a 2 man job turn into a 1 man job, or make any job that uses large or heavy material easier to manage.
http://www.sears.com/sr/javasr/product.do?cat=Bench+Power+Tools&pid=00922295000&vertical=TOOL&subcat=Stands+%26+Material+Support&BV_UseBVCookie=Yes
Those go on sale for anywhere from $12-15 pretty often. Don't cheap out on them- a wide base and heavy construction make the difference between ruining material and a perfect cut.
Lastly, don't discount the inportance of having the right blade for the job, and having that blade sharpened wne needed.
Maybe more info here...http://www.caraudio.com/forum/showthread.php?t=223662