I live in Hawaii. No satellite radio here

I'm willing to toss about $300 - $500 for a basic upgrade of some sort. If it's easy enough, I'm willing to do a DIY. If it's not, then I will need to take it to a shop. I just don't want to checkout a shop and have them over sell me on stuff I don't need - like replacement amp(s) or speakers. I like the double din idea, because i do think that a single would look really strange in such a big area.

I will definitely take a look at the DICE and CP600BMW options. Though I really like the idea of cleaning up the dash with a simple double din.

Thanks for all the advice, it's totally appreciated!!

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2004 X5 4.4i, Sport Pkg
2004 Tacoma Xtra Cab 4x4, 9" lift
2001 Passat, 1.8T
1995 Tacoma Xtra Cab 4x4, 3" lift
2002 GSX-R600
1987 Rebel 450C
2000 E-Z-Go TXT