This may sound bad but you can learn a ton from Crutchfield, but they usually can't beat Amazon on price, But if you could really use the personal help then they may be worth it. They do have any and all adapters that you might need including wiring kits.
Your stereo size is probably Double DIN, which as pointed out is popular on units with a DVD or other screen type unit. My personal favorites are Pioneer and Sony units as they seem to be a good middle price point for quality without paying too much. remember you get what you pay for. You may be able to get a deal on last years model on Amazon also. Not much has changed as far as options in the last few years.