Well hell yes. I'm surprised you haven't already as I would think most people would buy an AR then realize what they want out of an AR. You already have a "go to" AR so make this one a splurge rifle or build. Think of the perfect AR setup that would work for you and build/buy that thing. You'll be happy with yourself.

Look into LMT, La Rue, HK, KAC, LWRCI, PWS, ...... So many options.

You could go the .308 route as well.