I just ordered a pioneer premier p730 for $260 including s&h. I like the gimmicks. Also comes with a steering wheel remote that is infared and control radio and cd, so I will use it a lot. Some people said it doesn't fit our steering wheels, but I will make it fit. Speakers are next, I may end up only replacing front, then get an amp and subs, I'm thinking a sealed 10 and 160watt amp. Do you need a special battery for such a set up, and can I install a sub/amp myself, or will it be a pain?