Re: Best tube high gain amp at bedroom volumes
I was SERIOUSLY underwelmed with the Express series. It's not that they sounded bad, exactly, it's just the F-series they replaced sounded much better, both clean and high gain. The bluesier stuff was nice, but the Lone Star Custom was much nicer for that anyway, so the Express wouldn't really bring anything new to the table.
I'd say if you like Mesas, either a Nomad 45 or an F-30 would work well. The Nomad is stupidly versatile, sounds silky smooth at low volumes, and can crunch it up nicely on the third channel too. It never gets quite as feral as a rectifier, but it does the smooth mesa lead thing a lot better and has a bit of modded marshall color to the sound in Vintage on the 3rd channel, thanks to those EL-84's. Meanwhile, Modern will cover Petrucci nicely.
The F-30 isn't nearly as versatile, but has a great clean (think Fender on edge of breakup, as opposed to the chewier Lone Star) and while the gain sound doesn't cover half as large a range of textures as the Nomad does, for a guy who's looking for petrucci like sounds I think you'll be happy.