In reply to gethin_allen:
Aksiums are nice. Had a few pairs which i have ridden all year round. Stood up to abuse and neglect. Eventually retried due to rim wear.
I looked at the next step up Kysriums, was advised against it by my lbs (who I trust): they argued that whilst nice, they weren't sufficiently that much better than Aksiums for the price hike. They argued that Kysrium Elites were where the Kysrium range got good, and worth the expense. I've got a pair on my good bike and they are really nice, much faster wheelset than the Aksiums. (Or my unscientific test and comparison was bobbins)
Thought about getting some handbuilt wheels say Open Pro on 105? Infinitely rebuildable, not as expensive as you might expect. I've got some 517 ceramics on Hope Tiglide hubs on my mtb, which are absolutely brill, had hubs rebuilt and rear relaced with new spokes once in their 14 year lifetime. Stunning set of wheels.