[TychoBrahe]

I was hoping to get more into a portable setup with my HFI-780s, and I'm always on the lookout for a new challenge, so I was wondering which portable amps would be best to build? I've done little electronics work, but I'm far from slow, and have a father who's quite competent with these things, so feel free to suggest builds that are a step above "complete beginner." Cheap, small, and decent directions are a definite plus.

Thoughts, anyone?