I'd keep the Onix and monitors. Sell the squeezebox and use the Mac/Airport express and buy a DAC when the time comes.
Self powered speakers are still going to cost you at least $300, and you wouldn't be happy.
The only experience with downgrading I did was when I decided to sell my tecnodec and keep my Rega Planar 2. $1600 vs $300. I should have gotten a second job.
Don't know if your current set-up is head and shoulders above powered speaker set-up. It probably is, and once you've heard something better, it's going to stick in your head every time you listen.
Self powered speakers are still going to cost you at least $300, and you wouldn't be happy.
The only experience with downgrading I did was when I decided to sell my tecnodec and keep my Rega Planar 2. $1600 vs $300. I should have gotten a second job.
Don't know if your current set-up is head and shoulders above powered speaker set-up. It probably is, and once you've heard something better, it's going to stick in your head every time you listen.