Thanks for the additional comments and advice all - much appreciated. Now been riding for a few months and have got some miles under my belt - averaging about 120 miles per week and easily managed a 58 miler last Sunday. I'm never going to be a racer (the ride above took me just over 3 hours) but the Bianchi allows me to get a good pace going and don't feel like I am totally shaming myself in comparison to most of the other riders around when I'm out and about? Helps my mate who's training for triathlon/iron man goes with me.
Was looking at the Campag Zonda wheels - my climbing is getting so much better but curious as to whether a little less weight/better wheels would help more again. Or could it just be the urge to spend more hard earned and flash the bike up a bit?
Interestingly I haven't seen any other Bianchis around either although I know they're quite popular - maybe if we get more summer weather? Can't believe it took me so long to get into cycling - golf now comes a firm second best. Roll on some more sun!