Merlin VSM

I moved my system from a small room to a larger one 20 x 13. There is simply not enough bass from my KEF Reference 201/2 (associated eqip. is Aesthetix calypso, Primare A32 amp, Marantz SA1060 CD, Supra cabling). Would the Merlin VSM (MX or MXE)provide enough bass in my room? I am looking for a floorstander with a superb tweeter that is available used for $4000 or less. Music choice is primarily acoustic folk, rock and blugrass with symphonic music also (I know, weird combo). Thanks for your insight.