Hey guys, I'm a bit stuck on which headunit I should choose. I plan on running two tweeters on the dash, four speakers (2 fronts & 2 rears) and two 12" subs. I want to have one amp hooked up to the tweeters and speakers and one amp to the two subs. Or would it be best if the tweeters are hooked up to the headunit? I want the best sound quality I possibly could get. I have a budget of around $500.00 to spend on a headunit. I have made a list of headunits that I'm interested in, but I'm not sure on which headunit I should pick. http://www.pioneer.com.au/en/Products/Car Entertainment/CD DVD Players/DEH 7250SD.aspx http://www.pioneer.com.au/Products/Car Entertainment/CD DVD Players/DEH 5250SD.aspx http://www.pioneer.com.au/en/Products/Car Entertainment/CD DVD Players/DEH 6250BT.aspx http://www.alpine.com.au/showItem.php?item_id=160 http://www.alpine.com.au/showItem.php?item_id=44 http://www.alpine.com.au/showItem.php?item_id=43 All help will be greatly appreciated!