Go with Trimacs! Very cool fish and not everybody has them. You could get Jags (also nice fish) at Petsmart for $3.99. So it's really up to you. I just got a Red Tiger Mota female thats coloring up nice, so you could consider RTMs if you can get them.
i had a hell of a time saleing all my trimac fry, at least local. if your motivation is profit i would not do any spawning. if you want to see the behavior that the fish show. then i would do trimacs but you needs lots of cover for the female. cant go wrong with trimacs
IMO Festae or RTM...............Out of the 3 variaties mentioned Jag's because I perefer their apperence over the other 2 but ultimately go with what you think is gonna be the best lookin' pair.
Id go for the trimacs, just make sure they are from a good source. Id agree that a 125 isn't large enough for macs tho. Id then go for a pair of Midas great fish full of spunk! Always though of a trimac as a midas that was just released from jail with tatoos and fire in its eyes.
i went with the jags since the lfs couldn't get the RTM's or trimacs and i didn't like the midas that he had and he dont order to often so i settled with the jags