As far as a head unit goes, I'm looking for something fixed-face, with the option of adding Bluetooth and HD tuner modules, and with front USB connector and AUX jack. I'd been curious about the new head units that discard CD/DVD readers for an SD memory card slot, but after seeing the price premium, I think I'll probably pass on that. I had my curiosity piqued after reading the How-To for adapting a stock dash center panel to fit a double-DIN head unit; I dislike the thought of trying to work a single-DIN HU in the dead of winter at 5:30AM with heavy gloves. I'm looking to see which HUs have DTA, but I'm not having much luck in the south-of-$300 price range.
ok as far as HU go. getting a single din that doesnt drop down is gonna be tricky or something top of the line. but forget SD cards most thigns that can take an ipod. can be hooked up to a usb hard drive. i have 320gig of music tapped right in to my HU. they make some non DVD/gps double din HU that have HD radio, SAT, ect ect and there just like a large single din radio. there pretty cheep. but i would cruse crutch feild to find something you like. then google the model number and see how cheep you can get it. crutchfeild is good for looking up stuff. they have a crap load of things on there and you can cross ref. but there price is high.
example from crutchfeild
http://www.crutchfield.com/p_113DPX303/Kenwood-DPX303.html?c=3&tp=5684&avf=N
cheaper
http://www.amazon.com/Kenwood-DPX303-Dual-DIN-Receiver-External/dp/B001IBH3RS?tag=959media-20
^^^^^^$179^^^^^^
as far as speakers what do you listen too. what are you shooting for?. if you like me. im losing my hearing so high are all just for other people. so im a mid bass guy. i like to feel it all and rock out. you like heave metal rock, rap. oldies,
and the price normally follows quality but there are some things to just stay away from. but there are ways to get things cheaper.