I don't think you can go wrong. The big changes happened '05-'06. If either one has side-airbags I'd use that as the deal maker/breaker. If niether has them then it's a really tough call.
There are numerous V8/V6 threads. It seems almost everybody (self-included) is loyal to what they have which is pretty cool, it means you can't go wrong.
-V8 plusses: silky smooth, torquey, not that much of a hit on mpg.
-V8 minuses: no 2hi mode, timing belt that needs replacement occasionally.
-V6 plusses: surpringly good power & mpg considering weight and aerodynamics, smooth enough, easy oil changes, no timing belt replacement, 2hi mode.
-V6 minuses: it's not a V8, it doesn't sound like a V8, while more than adequate it doesn't have that silky smooth torque when the light turns green, it's not a V8, it's not a V8, it's not a V8, it's not a V8, it's not a V8, it's not a V8!
:cheers: