Sonnie

I'm thinking about taking the Klipsch plunge in my home theater room but not really sure which ones I need. At present I'm running a Denon 2807 Receiver with Boston Acoustics VR2 mains, VRC center and VRX surrounds. My room is 11.5' wide x 19.5' deep x 8' high... ~1800^3. Fully sealed and treated acoustically. I have a couple of SVSound PB12-Plus/2's and a DIY Dual 15" LLT. Needless to say... I'm overflowing with bass. I'm considering either the RF RC RS 52 setup or the RF RC RS 62 setup. There doesn't appear to be a terribly large difference between the two other than the size of the woofers... 5.25" vs 6.5"... then there is a 4Hz variance in bass response, 1db variance in sensitivity and 1800Hz vs. 1900Hz crossover point. With my small room, will the 52 setup be sufficient or is there reason to strongly consider the 62 setup? Are there any other considerations I'm missing? Many thanks! Sonnie