About service i dont know about Nikon but i know if something happens to your Canon it goes pretty slow and u have to wait for about few weeks....your camera is being sent all over the country and its annoying...and about lens and accessories i think its about the same...u can get almost all u need for both of them.
Yeah it is for hobby and I am starter in DSLR world had Canon Ixus 750 before. Just dont like D5000 to much cause it seems quite complicated with those settings.. you dont have buttons on the outside so u have to go to menu to change almost everything so Im aiming for D90 for now if we talk about Nikon. About Canon that error scared me a little and 450D is just little below something i would want. D40 had many err99 issues here around me so my first choice is D90 and finally decided....I hope ill manage to get that extra money i need to afford it...
Thank u for advices for now and if u have more please write to me.
Thanks people and I wish u great light to all

(not sure if u say that like we here)