I can give Superstar a thumbs up for speed of delivery and price, I got a set of wheels from them last week. They look great, run smooth and seem to have good quality freehubs (faster engagement than cheaper Mavic hubs I have on my hardtail) and rims etc. You get a full choice of hub adaptors too, all at the same price.
I can't tell how long they'll last yet, but first impressions are really good.
I been usin a set of Mavic Crossrides for the past couple of years which are lasting well. You should be able to pick some up for around £125 but as mentioned before, the engagement could be better and the hubs have a little flex in them too.