Gallien Krueger has a very small bass amp that sounds great with guitar.
It has more power than the Power Block since it's for bass but it has more tone controls and actually sounds more like a real amp. I plan to replace my PB with it. I can't recall what it's called. Check out the website.
The Powerblock was pretty much one of a kind. Five pounds, responsive preamp, Class D power, Switching power supply (will work anywhere on the planet), stereo/mono operation, speaker compensated output, stereo effects loop and a gig bag... there was a hole and it filled it.
I went the other direction as per the OP. I was looking for a backup to the ZT Lunchbox when someone turned me on to the Powerblock.
Now the Powerblock is my main amp with the Lunchbox acting as my backup!
Bingo, i think that's the winner. The ZT Lunchbox. More expensive than I was hoping, however. You like the PB better? How is the Lunchbox with pedals?
The Lunchbox takes most pedals very well. I found (like most solid state amps) that germanium and silicon based fuzz pedals don't sound as good as the transistor overdrive/distortion pedals.