Got Avid 2.0 wheels on my Tarmac road bike. Not sure if they are any good but I would like to do the same as I did with my 29Er HT. I bought some Hope Hoop stans for it and could not believe the difference to the performance they made. Especially at cannock Chase.
I use my road bike to commute and I'm 100kg 6ft 4 bloke. I think that's why I notice a good pair of wheels. £500 budget.