[capttb]

Both car and marine units seem to last about the same, I have a marine unit in because I wanted a remote at the helm & I discovered that sometimes you can get a marine stereo pretty cheap. I've attached a website that has a Pyle with 4 speakers on sale for $100. Check Amazon also, that's where I got one cheap.
Overton's - Pyle Hydra Series Marine CD Receiver Package - Marine Stereos > Marine Stereo Packages : Marine Stereos, Boat Stereo Speakers, Packages, Accessories, Antennas