@ Dad's Ute.
I just recently bought a 2011 SSV Ute, with the 'premium' audio package. It has the two 8" subs in side panels behind the seats and thats the only thing different i believe.
Now whilst it isnt the best setup ive heard, and my $1000 budget system in my last ute was much better, it is definatly better than my mates MY12 SV6 Ute. I find his lacks bass and because of the centre speaker the highs are really harsh, thats just to my ears though.
However in my SSV, whilst the two 8" subs do a reasonable job of reproducing the lows, (I listen to everything from hard rock/metal to wob wob dubstep to heavy hip hop and rnb) the subs rattle the s**t out of the plastic liner in the tub and you can noticably hear it standing next to the car even when its on around 15 volume. I am yet to disconnect the centre speaker cos again to me it makes the highs in my music sound harsh. The overall set up is missing the mids. Very noticable when listening to drums double kicking on the likes of blessthefall and etc.
I will eventually upgrade the whole system with quality splits, a processor and a sub or 2 (I like bass haha) in the future though funds are limited atm from buying the ute. When im ready to do this I will be going to FHRX studios in Caringbah, Sydney as Marty helped me out greatly with my last ute.
For the meantime however I will purchase a bulkpack of dynamat and some packing foam if need be to try and get some midbass back on the doors and at least quiten the rattling hopefully.
Just my 2c on the SSV Ute sound system