3200g (~7 pounds) for just the wheels? That's really heavy... I'd consider wheels to be heavy after 2000g.

Anyways weight isn't very important unless you're doing lots of climbing (starting at 3-4% grades from what I read). Most people believe aero wheels are more important than lightweight wheels in most cases of riding. Obviously you'll want lighter wheels if you're not going faster than 15mph on a ride (climbs).

However having nice wheels makes the ride better. Also aero wheels look cool too!