[Closed] I cant make my mind up...

I have a five year old Cannondale F4 which has been a brilliant bike considering I got it discounted in the first place. Recently, the rear hub collapsed (probably due to it being my 'do it all' bike and used, more often than not, for towing a halfords kids trailer which is not exactly light weight). Anyway, I've decided to buy a new set of wheels (hope hubs / mavic rims), and one or two other bits (new seatpost and saddle, etc). Having said that, I really fancy a yeti arc frame, and it's driving me up the wall wondering if it would be a major improvement on the cannondale. Help!!