Dread is right.
98 GT runs 225 HP stock
V6 2007 runs 210 stock HP
My car with minor upgrades and a nice run has about 215-220. So really its about the same 
Im thinking I leave everything and get a nice 2011 GT500
ps: edit: How goes the selling for you Dread? Any serious hits? Maybe you should advertise in NYC clist as well. Youde get more hits. My car sold for my asking price -250$ in under a day.