sorry, I'm not running the 480's, but I've been running a t+ for a while.
If you plan on 24-bit and you record louder rock shows, then I would highly suggest the ua-5. I have found the ua-5 to be fantastic at 24-bit, and ordinary in 16-bit. also, the limitations of the ua-5 being a "discount" box are only shown when you have to crank the gain, IMHO.