Best garage speakers

Used Bose 901's hung from the ceiling.

Yes, I was considering some 901's but not sure I have tech savvy to deal with the needed equalizer. I was considering a pair of Dalquist dq10'S from a neighbor. But they would require some upgrade possibly.

901's might do the job but you need the equalizer because that is part of the speaker system.

That is a lot of square feet for a Bose 901,  If you can't find the VMPS floor standers, go with at least a horn loaded, or super efficient speaker.
The Bose, The Dalquist, that kind of speaker, your amp is gonna run out of gas real quick in that big of a room.. It's your $$$, you can still buy REAL smart, The Heresy is a great speaker, just will need to add a sub.
VMPS, no sub needed, really they will out do ALL of the suggestions, I've had most of them, at one time or another. 

Close to the 500 pairs of speakers I've actually owned, 130 pairs, I made or designed over the last 45 years or so.  VMPS is one of the few besides the older RS Infinity speaker line, I still tinker with. Infinity just isn't efficient enough, but surely good enough, with enough amp behind it.

Regards

You can buy a new pair of EAW designed Mackie SRM450 1000 watt (powered) PA speakers that could blow the doors off your garage for about a grand a pair. I've used these in various forms for pro sound work for decades, and they're virtually bulletproof, very well designed, and sound amazing. Used pairs of these things are cheap, and no "home audio" speakers I know of can play as loud and clean as these things. I use an "unpowered" pair of the smaller 10" woofer version in my studio with a sub, and for live stuff also. They're even cheaper.