I've been through a ton of them and they all really lack headroom and BALLS. An uphill battle you'll fight on all of them is what your cabinet is wired up for. I've rewired nearly all my 4x12 cabinets to 4Ω to get the most power out of the power amps. The more compact/small the power amp is, the more like dogshit it will sound.
The Seymour Duncan Powerstage 170 was really the only solution for me. You get 170W at 4Ω, but only like 85W at 8Ω and 42W at 16Ω. The PS200 and PS100 have some weird shit going on with their units where it will always clip no matter what's plugged in. It's yuge, but it hasn't left my board now for years. I use the Powerstage 700 in my home studio to power several cabs as well.