Again, crutchfield is WAY overpriced. If you're not using an amp, I wouldn't worry too much about what head-unit you want to use. Nor would I worry about iPod connectivity. Get one with a USB port & plug one of these into it. 128GB is PLENTY of music, and you can just plug it in the USB port & forget its even there. I've got one on the way for my head unit. Plus you don't have to worry about the battery on your phone/device.

http://www.amazon.com/SanDisk-Ultra-...=ultra+fit+128

FWIW, I used quick-splice connectors when I did it. Butt splicing, twist splicing, etc--these all are a pain, hard to reverse, and potentially can fail. The splicers I got are reusable, you just put a wire in from each end, and snap it closed. Cake. For the head unit though, I HIGHLY recommend getting a loom (wire harness). This item plugs into the stock head-unit plug & then is custom-wired to fit your aftermarket head-unit. The beauty of this is that you can simply unplug the loom & directly plug in the stock radio without any work. Plus, if you swap out head-units in the future & you've already chopped off the stock plug, you get more and more of a rat's nest over time.

P.S.
One last thing. Don't pay attention to the peak wattage of speakers or head unit. Pay attention to the RMS of both--they should be near the same range for maximum results (assuming you are not using an amp).