Asus, MSI, Leadtek, Gainward, and Chaintech are all said to make good products. If you wanna save some money, get a Ti 4200 and overclock. The MSI Retail w/VIVO has the best overclocking ability and at about $135, it has a great price. On average you can get a Ti 4200 to overclock to at least a stock Ti 4400. Anywhere from 250/500(default) to 320/610(MSI...very loud HSF though). But on average you should easily be able to get 275/550 w/ the stock fan.
BTW, Asus are very expensive.
Good luck.