I won't cast a vote as I've not heard Enchant, but I'd take It Bites over Arena any day.
Once around the World would be in my top 10 prog albums of all time, for the sheer enjoyment it gave me back in the day. Frank Dunnery was an astounding guitarist. He was just 23 when they released their debut album, and I'd say for sheer technical ability he wiped the floor with many 'masters' Live they were incredible. I've never heard such good live sound.
I also like what It Bites tried to do.....progging the listener by stealth, through the back door. Some listeners did'n tknow they were listening to prog rock until it was too late..!
I knew outright pop fans who ended up listening to Rush, Genesis and Marillion thanks to It Bites.