Looking for great Amp for Martin Logan Prodigy woofers

A pair of Anthem M-1’s would easily do the job and don’t take up much space.

https://www.anthemav.com/products-current/model=m1/page=overview

In regards to the M-1’s, those amps got a horrible review because the pair that they were sent was completely new without being properly run in.  The amps are a minimum 300 hour break in and will actually sound worse as they play and after about175 hours they will finally start to crawl out of the hole and begin to get better ultimately surpassing how they started after taking them out of the box.  They probably we’re at the lowest point around 150 hours when the review was written. A properly broken in set was sent after and I believe there was a small rebuttal that was posted, but the damage was done and the”audiophile” community avoided them.  Many dealers use those amps to run passive subs, even over one particular high end in-wall brand who makes their own amps.  It was a good learning lesson and every product that has ever been reviewed after has always been properly broken in before sending to a reviewer.  Thanks!

theaudioman; Sorry, I missed the part where you gave your budget in your opening post, which would rule out the M-1’s

Overall, I would say that you’re better off with one or a pair of better mono amps vs trying to run one amp on the highs and something different for the lows. I would try to do two of the same amps, which in this case would be adding another VT100. 

A better sounding amp is just that - better! The VT100 will run your Prodigy’s fine and I don't know if putting a Krell on the bottom will really give you all you're looking for. Something you could consider is upgrading your speaker cable and having them made in a bi-wire configuration, unless you like to change and go through cables, then it’s usually easier to sell non bi-wire versions.  Just my opinions...