I personally never cared for the rental-car interior, but not a whole lot you can do about that... My wife (oddly enough) also feels that even the SRT-8 doesn't have enough rumble to it - it just doesn't sound like the old muscle cars. But I believe a Cold-Air-Intake and some 30-series Flowmasters would fix that quick for not a lot of money.
Other than that, I just recently met a SRT-8 owner after havin' some fun with him in my Viper just before the Carlisle show. We stopped for gas and he said he loved the car - lots of room, modern features, but a lot of power and performance.
I say go for it! Just don't stick it in the garage thinking it'll double its value in X-number of years - ain't gonna happen. Drive it, enjoy it, and bring it to Carlisle next year ;-) lol!
Jeff