Bit of both, it's on my board last in the chain so it goes into my amp, if PA support is required, it runs into the PA as well.
I basically run my LM2 head flat at all times, the 'vintage' guff completely off etc.
I wanted to go down the route of just a power-amp, tried the GR Pureamp 800 for that, but that wasn't up to standard (IMO), would love to try out the Trickfish Bullhead Mini, which isn't just a power amp of course, but super clean/transparent by all accounts. Perhaps when life costs settle down a bit, luckily everything sounds great at the mo.
Si