hubs for cxp22's?

looking for some advice and opinions:
I have a secteur sport which i have upgraded with a 105 5700 groupset. Now want to upgrade wheels, but from reading around, I think i've got to spend a fair bit to get the next real step up.
The secteur came with cxp22 rims and unbranded (guessing shimano) hubs.
So, is there any value in buying some better hubs and lighter / bladed spokes and keeping those rims and getting the wheels rebuilt? I'm 12.5 stone if that's to be considered.
Thanks
I have a secteur sport which i have upgraded with a 105 5700 groupset. Now want to upgrade wheels, but from reading around, I think i've got to spend a fair bit to get the next real step up.
The secteur came with cxp22 rims and unbranded (guessing shimano) hubs.
So, is there any value in buying some better hubs and lighter / bladed spokes and keeping those rims and getting the wheels rebuilt? I'm 12.5 stone if that's to be considered.
Thanks
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CyclingInTheFlatlands
http://www.merlincycles.co.uk/Bike+Shop ... 01-C30.htm
with 2 free tyres for just under £100. After I put them on I might have a try at rebuilding the cxp22s myself - however I was worried about the timescale for getting something done if I took them off without having a replacement.
Bladed spokes are expensive e.g. Sapim CX-ray cost over a quid each so you'd probably be looking at > £100 for spokes alone. Sapim Laser or Race are a bit cheaper, but you'd still be looking at £50 plus. Almost certainly would be better to buy a wheelset and then use your current wheels as winter wheels until they wear out.
I didn't realise spokes were so expensive until I just started looking and doing this.
Would there be any reason that the current spokes couldn't be re-used? I'm guessing with very limited technical knowledge that it depends on the diameter of the new hubs?