Just a few things:
1. Rim depth is only a part of a wheel being aero. Spoke count, spoke shape, hub flange width, rim shape(including width) all play in to wheel aerodynamics. Its part of the reason that its hard to say "this wheel is aero and that wheel isn't." Most wheels cover a spectrum based on choices made by the manufacturer. For instance, Easton's EA90TT wheel is fairly aero for a 32mm deep aluminum rim but it has a narrow front hub flange and few spokes; so while it does well on the aero spectrum some aren't thrilled with its ride qualities. Alternatively, the rim is narrow so maybe with a 20mm tire it could really shine. In addition, some wheels are aero at certain yaw angles.
1. b. In response to Kayrehn, there are a ton of manufacturers doing wide aero wheels besides Hed, Bontrager and Zipp. Rolf, Mavic, Shimano and even Gigantex ad Novatec. Wide rims definitely aren't the end all, be all to aerodynamics. It seems to me that for some reason some wheels do all right even without a perfectly mated tire width.
2. Don't ever get Ksyriums.
3. Aerodynamics do make a big difference, more so than weight in most situations. Its definitely worth consideration. The hard part is that for over 75% of products we don't know how they truly stack up in terms of aerodynamics. We can only make educated guesses. The easy part about weight is that we can just throw the parts on a scale and have an answer.
My final recommendation would be the following:
1. 20 hole front narrow soul kozak hub (95 grams)
2. rear 24 hole soul kozak hub (225 grams)
3. Kinlin XR380 rims (1100 grams total)
4. front sapim cx rays (100 grams)
5. rear sapim lasers (120 grams)
Total weight is 1640ish grams, 38mm deep rims, 20.5mm wide(so not super narrow), maybe ~$650