I use an ACA1234 attached to an ACA500Plus for non-AGA games and its definitely a big benefit. There‘s many games that benefit from a more powerful CPU while more RAM is always a big win!
You can run „Beneath a Steel Sky“ Talkie version with 128Mb Ram and other point & click adventures such as „Indy4“ or „Cruise for a Corpse“ run much smoother, too. „Stunt Car Racer“ or „Elite II“ work like a charm, too!
An ACA1234 is a great booster and I dont want to miss it anymore!