I love Costco personally... the return policy if things go wrong is the best. BUT... they don't have a great selection. Otherwise, go online: this site... http://www.cheap-lcd-monitor.com/ is a good one for reviews etc. Then price shop, on PriceGrabber, or MySimon HTH
Are you looking for a CRT or an LCD? In an LCD, Samsung, Dell and Planar make excellent monitors. You can find reviews at cnet.com. As to where to buy, I think ebay is a great place to get a good deal. You can also try tigerdirect.com. Good luck.
thankx , i bought 2 19"samsungs that u can rotate 90' they look pretty nice and i have a lot of space for quotes