Choking more SPL's out of Maggie 3.6's

My system sounds fabulous, but I can't get it to rock really hard. Not even close. Live classical performance, jazz performance, acoustic show, etc. no problem. Good and loud on rock, yes. I may have to change something, but I'm hoping not to change my speakers.

My system is as follows:

Maggie 3.6R speakers
REL Storm III sub
Bryston 7B-ST mono amps
Rogue 99 preamp
Linn Ikemi cd player
Nottingham turntable & arm
High output Dynavector cartridge
Acoustic Zen Satori Shotgun speaker cables (7 foot)
Transparent Music Wave Ultra interconnects (RCA)
(1 meter all around, except preamp to amps which is 15 foot)

The room is about 18x23 with a 7 foot ceiling.

Is there any way to get the Maggie's to go a little louder? Just a little? The Bryston monoblocs are hefty power, but when I play hard stuff (now and then) and I want to get a little carried away, I hit clipping before I hit the point where I can't hear myself sing. I never used to get to this point with previous dynamic speakers, but all those were flawed in so many ways in which the Maggies rule. Any advice would be very much appreciated. Otherwise I'll listen to most everything at home but go to the car to really rock out.

Thanks in advance.

Rich