I think you will need more power than your Onyx SP3 to drive and control the sealed woofer in the 3.1. Also, from my experience with the Gallos, your room is going to be too small. You need to be further away from them in order to get the soundstage height correct, or you might have to raise them up on some taller plinths/stands.
Am I going to regret the Gallo 3.1s?
I am not rich. I am college student that doesnt have a ton of money and love music. It all started years ago with AV123.com and the purchase of the Onix SP3/Reference 1 combo. Over the years, I have loved the combo but wanted to move into a more dynamic full range speaker... Years went by and as the Gallos came out, there was something about the design that just sucked me in, making me really want a pair. The problem was, they were just waaaay too expensive. Well, times have changed and I now have the money to finally get my hands on a pair for under 2k. My question is... is it too late? Are they outdated? Is there "something better" for the money now?