Im in the market for a new head and looking into one of these

I love the flexibility and the fact that if a power tube goes you can go straight from the preamp to the front of house etc

However how good actually are they?

I play metal in drop b however I love quite a vintage tone, I do play a couple of songs I need a little extra gain for but most could daily be met by like a jcm 800 gain level

Please give me your thoughts