installing a new bathroom sink, should I replace the water valves? Raise the drain pipe?

[Racer X]

mattkime wrote:
[quote=Racer X]
if you replace the valves, go 1/4 turn ball valves, and made in america.

Not sure if its possible, but all metal would be preferred as well.
Yes, 1/4 turn brass ball valves, hopefully made in america.