I am finally starting to want to improve the sound system in my SRT-6. I have been riding in my friend's G37 with the Bose studio system too much and it is making me envy. My biggest obstacle is that I would like to keep the original non-nav head unit for aesthetic purposes--there's no getting around this. I got a good deal on a pair of Infinity Kappa 62.9I door speaker replacements, which I hope will deliver some improvement, but I would just generally like to have MORE VOLUME from the system--sounds rather weak in comparison with some other vehicles. What are some other options I should consider?