I love the tone of my 90's B100R w/ the blues band I play in but it's too heavy so I leave it in my practice space. So I ordered the new RB-115 for gigs. Any knowledge on which eminence speaker to use if I decide to swap the stock 8 ohm for a 4ohm to get the full 200 watts at the internal speaker? Of course, I may leave it as is. I do have the GK 200MB for loud rock gigs which puts the full 200 watts into the cab 15" speaker.