I agree that Edmunds is prolly your best source as they have dedicated chat topics for this car (and others) in the "Car Discussions" area. Plus they've road tested and evaluated them in the past.
Why not the V8 model? Prices between the two are pretty close. That 4.0L V8 kicks butt.
I assume its the base LS with auto, not the Sport model or the 5 speed, right? Auction prices are kinda all over the place which says they run hot and cold depending on demand. With low 30K miles wholesale prices are high 12's to low 15's with the average around $14,000. Retail is prolly $17,000 and you should get one for $16k. Could be better if the dealer bought it right. Could be worse if they did something stupid.
Great cars, though. I think you'll like it.
Code:
Condition Above Avg Below
Wholesale $15,700 $14,350 $12,950
Retail $17,450 $16,000 $14,500