Honestly if you want an unflashy cd player get a shitty audiovox one form walmart, they are like 50 bucks and dull gray and just look cheap. Any half way decent cd player that anyone would be selling used is gonna look alright. I honestly think those two pioneers are very basic and unexpensive looking, but I'm used to lcd displays and such, and don't have the mind of a thief.
Either way, good luck to you man.