Ok thanks for your advice any advice and suggestions are welcome going to take this week to phone a few wheel builders and make my mind up, changing the crankset this week as the sprockets are not brilliant , bought all the tools and a nearly new crankset it was something I allowed for at the purchase price of the bike £350.I think i may have been about 17 stone when I started running on my H Plus Archetype rims & they were fine, so 18 stone should be ok too. I wasn't & still not bothered about the wind, but the deeper your rims the more you will notice the side winds, so something to be aware ofI'd go for 36 spokes on the rear & 32 on the front for strength if that's an option👍