Preamp recommendation

The Anthem MRX receivers are very good and have very high resolution speed and attack.  The downside is that in some systems, the Anthem could sound too bright/harsh on the high frequencies.  This could definitely be the case with your Focal. If you went this direction (and possibly with the Monlith amp), I would recommend some nice copper solid-core speaker cable, such as Audioquest Rocket 33 or Type 8 or Type 4.  Also, use gold-plated terminations instead of silver.

The Parasound would definitely be more forgiving on the high frequencies.  You will likely have to spend a lot more to get a high resolution amp that is not bright, and you also should still avoid stranded speaker wire with anything silver or silver-plated.

If you are wandering around in the budget area of a Parasound A51, there is a Chord SPM-2400 five channel amp on audiogon for $2999 from a dealer.  This would be the next step up which would give you excellent resolution without being bright/harsh like the Anthem or Monolith.  It would not be warm with soft/rolled off highs like the Parasound.

Found a classe ca-5100 amplifier, brand new, NOS. for $2.5k. 
Anyone know this amp? Would it be a good match with Parasound P7 and focal speakers ? 

Also Anthem P5 amp for 2.7k, but used. 

Wyred4Sound STP-SE - I have the standard model and I'm very satisfied. I can't imagine how the upgrade could be better.