New Amp help/recomendations?


Hoping some can share experience on this topic. My current amp (ARC Ref 75) while I love the sound is not powerful enough to drive my new speakers - 89db/4Ohm Sonus Fabers. I mean volume is there, but soundstage a bit collapsed, Dynamics a little flat and bass missing oomph speakers are more cabable of.
Amps I am targeting - through lots of reading and research, since I can't get out to listen - are the following:
PSA BHK 300's, Krell 300XD, Theta Promethius, Pass Labs 250.8, Modwright 150se,
Thanks for input/help here.

mmj
Its not the power. Its the amp. Try a Raven Reflection MkII, you will have no complaints, dynamics, stage, or otherwise. Probably you will have money left over after selling the preamp, IC and power cord you no longer need, and will have no complaints about that either. Spend that money on a DBA and not only will you have no complaints you will have better bass than ever. All without spending a dime.
Do those Raven amps still come with a fire extinguisher? My memory is faulty at times but I thought one of their amps went up in smoke during a Stereophile review.  Honestly though...I've heard people love the Reflection MKII.  I'd like to check one out sometime. 
I had to look up Raven as I've never heard of them. Interesting looking stuff.
So, for the first time in my middle aged life, and after 18 monthes of construction, I finally got a dedicated listening room!  No time for integrated amps now, I can put sh#t anywhere! No more shared Living Rooms. Heck, I'm leaning mono blocks all the way!