GLiDE-BPM - my wife would gut me from crotch to eyeball with a dull deer antler if I spewed enough cash for the Gemini after buying this expensive toy! LOL!
Sometimes I just use the sound on my JBL EON615 sidefill monitors and don't use dedicated FRFR at all. They are economical and sound almost add awesome as my Gemini 2! I keep getting more lazy and piping more guitar into them. They are on poles pointing toward us on stage. They get pretty freaking loud if you need that to feel more like the air pushed by a cab on stage. It's more simulated because up on a pole about face level, you don't need a ton of volume to pound your head into the wall.
I call it a more simulated amp feel. An EON615 has plenty of power to go on the floor and still make your ears bleed. The combination of that 15" and that horn do a great job for guitar, especially compared to some other 15" plus horn boxes.
I actually build my presets using a cranked EON615 at the house. They sound great on the Gemini 2 as well, so I just keep building using the EON615.
You can find EON615's for $500 and less. Check Proaudiostar. They even have used for $299.