kenwood isn't that great, and sanyo, i didn't even know they made HU's, lol. i'd look at Pioneer Premier or Alpine. you can get them fairly cheap online.
it might be useful to post what features you are looking for, also what kind of components you will be hooking to it.
I am getting advice on subs and an amp right now and I am going to post in the speaker section for advice on speakers. After I decide what I am going to put in I'll post it here. Thanks