Sonus Faber Venere 2.5 amplifier Recommendation

Using a Conrad Johnson MV55 at 45wpc. Feel like I need a little more control of the bottom end. Does anyone have a recommendation for an amp or integrated that is synergistic with these speakers. 

Much easier to make vocals sound good. You know you have a good synergy when you can listen to western classical and rock music at moderately loud levels without hurting your ears.
I had the same problem with my 2.5's. I have carpet over wood suspended floors and had my speakers in a platform that was pierced through the carpet into the wooden floor. I'm a little hard headed and ignored a friend's advice of suspending the speakers instead of anchoring them to the wooden floor. I went to Home Depot and bought two 17" square ceramic tile and layed them on the carpet and put my speakers on them. Wow, what a huge difference that made. All the energy of the speaker was being wicked into the floor and not into the room as music. Bass is deeper and much more controlled. Dynamics went through the roof. Everything was better. 1.5 years until I finally heard my speakers for the first time. So... If you have wooden floors, find a way to suspend you speakers. If you don't... 

Thanks for the advice. Right now the speakers are in a room and the house sits on a concrete slab  and so do the speakers. Do you think I should decouple them from the floor? 
I don't know if it will better the sound or not by de-coupling from the concrete. But it will change the sound. I would buy the 6" ceramic tiles and buy some kind of foam or cut some thick carpet to put between the tile and the concrete. Just experiment and you'll find something that works. Good luck.
Dont give up on those speakers. They are very good and will respond to up front changes very well. They have a little bass hump at around 80hz, but it helps with rock. 
I also had the 2.5s on a concrete slab in a good-sized room and couldn't get rid of bass hump.  This bass issue has been noted by some good reviewers, and you can see it clearly in the Stereophile performance measurements...

The only ways I could think of to deal with this effectively, short of adding a sub (which is not a bad idea BTW), would again be to try bass traps or possibly some form of equalization.  Best of luck.