IMO, since you have the TV already you should give it a shot. If you aren't satisfied, then get a dedicated monitor.
Your video card and motherboard should include disks with drivers. Go ahead and install from the disks to get your system running. After you get everyhing going you can update your drivers.
To check for updated drivers, go here for your video card: http://support.amd.com/us/Pages/AMDSupportHub.aspx
Just select your model an OS.
To find the latest drivers for your chipset/motherboard, just go to asus.com, find your exact motherboard, and download the drivers.