Congratulations Steve, a very nice looking car (although I prefer the sportier-looking wedgier-shaped 3dr)
As I believe I've said on here before - I'm a big fan of Citroëns, had a then-9-year-old BX GTi as my 2nd car back in 1998 and absolutely loved it, then more recently my Xantia was an excellent car too.
I did look at a C5 before I bought my current Honda Accord, and if I recall correctly I would have got a significantly newer model for my budget (I think it was an 02 vs my V), but I found the dash plastics a bit - well - plasticky, so that and the VTEC engine won out in the end.
Happy motoring, though! How are you finding the "quirky" steering wheel? A great feature IMO though never experienced it "in the flesh"...