Here's my opinion for a home player, which I am and for what my opinion is worth...If you want to keep your amp, keep it. I know nothing of the HS8's but I've got Output One going to my Gemini II...I use an EV-1 hooked to one of my FC-6's that is dedicated to be a Master Volume. I've got the Gemini at about 80% volume and adjusted all my presets to be 85-90dB with volume pedal pegged. Saves me from having to reach behind the cab or adjust in Edit or Front Panel.
Output Two goes to a pair of 100watt Kali LP-8v2's that were very affordable. All my presets have Output 1 and Output 2 blocks and I've spent a lot of time adjusting so I never get blasted when changing presets. I use the Kali's a bunch lately just because it's convenient but once in a while I'll turn on both,, get in the sweet spot and it's glorious!
I started with a FM3 before moving to the Turbo...when I first got it I had an old Carvin TS-100 stereo amp going to a 5150III 2x12 and a Carvin VX2X12...it was ok but I wasn't getting to use the Cabs...you can but it colors them.
Between the Factory cabs and the fact that most cab packs cost less than a dozen golfs balls it's just a shame to not get to use that variety.