Yep...that's what these forums are for...ask away!
Check out the graphics forum for you video card question...it has been asked and answered many times as to which video card is the best. What kind of games do you play? I'm not sure which would be more beneficial to you, the 4800 or the 4200. For the price, the 4200 seems to be the winner in these forums.
In the meantime, here are a few articles regarding brands of ti4200 cards:
MSI vs. AOpen vs. Abit MSI vs. Gainward vs. Vistiontek vs. Best Data vs. X-Micro Abit vs. Inno3D vs. Gainward vs. Prolink vs. Visiontek
There are tons of other companies making the 4200...Albatron, PixelView...I'm sure someone here can tell you about their experience.
My personal favorite video card is the ATI 9500 pro...for the money, it's performance can't be beat.