I'm going to be upgrading from my Powershot A640 to a DSLR. I was planning on a 400D with a sigma 18-50 f2.8 lens as my budget isn't huge and it seems a good starting point but a friend has just upgraded to a 40D and has offered me his 30D with canon 17-85 IS USM lens (haven't talked money but price would be about the same).
I have read this comparison... http://atinyblip.wordpress.com/eos-30d-vs-400d-a-comparison/
and the 30D seems the better model only thing bothering me is it being slightly older and used (albeit mint).
Any advice? and anything else I should think about buying with either camera? (apart from memory cards)
thanks in advance 


