Compare Bob Carver Black Magic 25 and Rogue Stereo 100?

Both are online so no way to audition.

^That^ says enough to know that neither will likely be a keeper.

hence; I would proceed slowly.

I sort of hate to mention it, but i also hate to half-a$$ a system…

The earlier model AIYAMA A-07, for ~$70 from Amazon, is being used on surround and center channels in a 2.1/5.1 system… and if you are hard up for an amp it is not bad. My 2.1 side is a bit on the high end side… and the 5.1 is also a but high end at the AVR, but quickly goes economy at the amps.

Do not get the newer A-07 Pro

My daughter put one on a very modest stereo system as well. She has heard some pretty expensive systems, and agreed that it was very much fit for purpose.

IMO you would better off with a simple, or a descent Class-D, over the Carver or the Rogue. Or a better tube example…

But a gun to the head would result in Rogue… or a used PrimaLuna or ARC.

The OP asks which to choose over 2 different tube amps and gets a class D recommendation. Go with the Rogue, carver has had some problems recently.

I have never heard the Carver but here are the facts-

with stock tubes it puts out 25 watts per channel. 

it does not appear to have a large bank of filtering or storage capacitors. 

it weighs 19 lbs. 

reports are circulating that it actually produces less power than claimed. 

I have owned the Stereo 100.  It produces 100 verified watts per channel with the KT120 tubes. 

It has a very powerful, impactful, dynamic sound that is more impressive than its power spec. 

It has a large bank of filtering and storage capacitors - at least 8 large caps on the chassis. 

it weighs 60 lbs but is also more expensive. 

the stereo 100 is a winner, if you have the funds by all means this one is recommended.