Upgrade pre-amp to C2200 or speakers?

I have to upgrade my pre-amp and speakers but can only do one for a long long time. I'm currently running a McIntosh MVP851 into the MHT200 Home Thetre processor which runs into 2 MC275 Mk IV. They are driving a pair of B&W 804s (Nautilus not Diamond)

My choices are adding the McIntosh C2200 preamp or changing speakers to a pairof Tyler's Super Towers. Which way would you go?

Also, my listening room is 11X20 but the speakers have to shoot across the 11 ft space. Tweeters are at 44" which is about 3" above my ear.

Thank you