nikon v sony

[pike25lb]

hi to all
iam after a new camera i think i would like one of the following the Nikon D3000 maybe the d5000 but maybe out my price at the min
Sony a230 / a330 / a380 my be that one bit out my range but i can still dream on

my question is what would the experts go for it will be my first dslr

will be taking action shots of dogs and just out walking the woods fields and day out with family and in house nothing major heavy as just starting out

also there is the upgrade lenses who is cheaper as Sony have built in is in body and Nikon in the lens so who is the cheaper for lenses my be -55 to 300 or 55to 200 or 18to 200
what are the prices like in comparison thanks