Your plan is perfectly viable Psychotic - All normal Space Marine units have a Chaos equivalent, with the exception of a few types of Tank, Scouts and the Land Speeder, all of which are completely easy to do without

There is an alternative of course, and that is to simply play a normal Space Marine Army and paint it up as though it was Chaos. If anyone asks, tell them it's a custom Chapter of your own creation that has only recently fallen to Chaos. The rules needn't be any different to normal SM's, but you still get your evil pile of psychopaths without daemons!