a small little comparison, one uses 0 gauge power and input, and is double the size and double the components. The other is literally a little less than half the size with 4 gauge inputs. Not even a brazilian full bridge design. Which one should make more power?Also similar to apsm's but I'll be the first to admit board layout isn't everything.

i LOVE the old d series mmats! I've had several and they are amazing if you can scoop them up under 250. And yes, they sell regularly on ebay for around that.It really doesn't matter much to me what you all run, or like. AB, DD,DC,AP, Sundown, ect ...none of it is any skin of my a r s e, I'm going to be running Mmats. And I know those work great, and make power ...and are efficient ... But, they are not in the OP's budget.
I have benched the MA N3, and it makes what it's rated to make, at what/where it's rated to make it at. So, I would kinda assume the N4 would too, which is really the same as the AB ph4000 .... it is a decent budget amp. But personally, I'd wait for a good used mmats, or US Amps to come up, and buy it ...
OP, you just missed a mmats d100hc on ebay, for $250 .... they regularly will bench at 1700 rms, easy .....and are over 90% efficient ....
And the Merlin md3d i just sold did over 2400 rms ....
Do you think we all started with nice stuff? A turd is a turd. Nothing will change that. Most of the cheap overrated stuff isn't really cheap. You are paying for what it really does. You are not getting anything for free. One day you will see past the bull ****.