hi i'm looking at buying a whistle patwin 1381d currently have one on display in halfords, only 15kgs and they will do it at 479 with 10% off as its a display model, just wondering if its anygood before I fork out this kind of money for a bike, want to get a tidy one now as been cycling to and from work for the last six months, and enjoying the fitness. tried a racer but I'm too big for it and didnt find it comfortable, I like the idea of the 29 inch wheels suppose to be more comfortable than the 26inch also suppose to be better for higher speeds.