i totally get the urge to upgrade so quickly.
generally, upgrading wheels will mean lighter or more aero, and there are lots of options.
the bad news is that really light wheels might have a weight limit.
the good news is that if you just keep riding more, the weight will fall off and you'll gain the experience and fitness to help you better make this decision.

how about this: take a look at the Soul S2.0 Max - it's a little beefier to handle heavier riders (I got the S2.0 at 175lbs.) and not expensive.

i'd just ride the hell out of your current bike until you reach a goal weight and use upgrading as your reward