I am looking for a gen 4 to use for my daily 45 mile commute and to tow 3-3.5k lbs. maybe twice a month around NE Pa and down to W Va once or twice a year. It will also see some light off roading and be the dog (3) transporter. Is the V6 good enough for towing this weight up mountains or should I get a V8? Are the 05 and up V8s that much better than the 03-04? Prices for either the V6 or V8 are pretty close in my area, but there aren't many V8s. I will be looking for a limited model if that matters. If a V8 will be better I will also look at the Lexus GX. Thanks for any advice.