If it's your only set of wheels, get something that your LBS can service and provide warranty support. If something goes wrong, you don't want to be shipping wheels around the country while you cool your heels without a ride. That also means normal spokes and nipples that your LBS might actually stock. And just say 'no' to internal nipples. I think the EA90 SLX you mentioned fits the bill although I've never ridden or serviced them. The one pair of Easton wheels that I've had up close were built really well. The freehub body is probably aluminum so be aware that Shimano/SRAM cassettes will score it over time.