Suggestion between benchmark Ahb2, Bob carver crimson 275 and rogue atlas magnum 2 amos

Anyone considering a Carver Crimson should take a good look at this thread:

How Bob Carver is Destroying Vacuum Tube Audio

Since you've ordered a Rogue preamp, your best bet for synergy and success would be to pick a Rogue amp suitable to you speakers and budget.

Stretch a little for a new or used Rogue Audio Stereo 100.

Even though it is rated for the same 100 WPC as the Atlas, the St 100 sounds twice as powerful (better power supply circuitry).

The ST 100 is a reference quality amp that solid state cannot match IMHO. I had the 100 and sold it to buy a Pass Labs amp and still wish I had the 100. Just a dynamic, special sound.

Benchmark for the metas. No doubt. Should be the bees knees. Tube amps may sound good but metas not designed for those. I have benchmark targeted for use with both my metas and Ohms someday when the time comes for new amps.

Bob was highly regarded for his SS equipment. In my opinion, his new tube equipment is not up to the quality that one would expect from such an excellent designer. His claim about how long tubes will last is all marketing. I'm afraid he's just in it for the $$ now ☹

Benchmark all the way! 

I remember the first time I heard the LS50s.  It was partnered with high end solid state amplification and i thought they sounded very good.  The next time I heard them was a dealer that carried Raven Audio tube amplifiers.  

I was stunned at how incredible they sounded, from a 20 WPC tube amp.  So sweet and holographic.  More than enough power.  

I thought now I see why there is such buzz about these speakers.  I bought the amp on the spot and the KEFs shortly after.