general purpose - first dslr camera

I am planning to move up from point and shoot digital cameras to dslr.  I had an old Minolta w/ a 35-70 (x1.5 in digitial??) lens  and a 70-210 lens.  From the research, I had pretty much settled in on the Nikon d3100 but took my old lenses along just in case there was a chance they would work on sony - and they do....

The bad news is that this makes it a much tougher decision - so now it seems that I have the choice of the nikon for $550 w/ no zoom lens or spend $700 w/ zoom lens or get the sony for $700 and be able to use my old  lens's  or just get the sony body and use my old 35-70 as my main lens......

From all aspects this looks pretty much like a draw to me but would love some opinions.