I thank everybody for their input. I think I will keep the 450 & buy myself a decent lens. At the moment I have an 18 - 55, 75 - 300 & a 400mm cheapo Tamron lens, but have always wanted an L series ever since I used my mate's at Wigan earlier this year.
I'll have to let my mate down.
Anybody wanna buy a 50D cheap?