Cleaning is fine mate and it will take claybar as well, used it often on my rally ones. Vinyl would be a good option, but that will propably cost more than a respray if its a full wrap, or at least as much. The thing is, as you say, its reversible by removal and the vinyl wont do your paint any harm.
Whatever you choose, matt black gets a big thumbs up from me especially wiht the right wheels and the other bits and bobs you mentioned like lowering etc. Look forward to seeing that.