If it were me, of the two, I'd go S&W...
Or you could easily "build" a superior rifle here...
BCM Lower Receiver Groups M4 AR15 I got one of these blem lowers a few months ago and still can't find the blemish.
BCM M4 16" Upper Receiver Group Don't forget to add the BCG.
Magpul MBUS Rear Back Up Iron Sight - Black
Magpul MOE AR15/M16 Grip - BLACK
Magpul MOE Enhanced Handguard
Magpul MOE Stock Black
Total before shipping and transfer fee is $946
Shipping and transfer fee might add $60
I built a rifle using this upper a few months ago.
BCM 14.5" Mid Length Upper Receiver Group with Daniel Defense 12.0 Handguard
All of my transactions were seemless and shipping was very very quick. BCM is a great company to do business with.
Oh, if you have never done a transfer before or you are a little leary of putting together an AR I am sure there are people on this board in your area that would be more than happy to help you out.