One thing that's worked for me as a modest, portable, low-volume Jerry-esque setup is a Fender Pro Junior with a JBL K110 in it. It's a 15 watter, and with the JBL it'll get loud enough to bother the readily botherable, but it sounds good low (crank the tone control, though). Very simple amp--two knobs. Also: Relatively affordable as this stuff goes. Maybe $300 tops I'd think for a used one in good shape and another $100 for a k110, which would be optional anyway.
That said, I have a full-on, fairly overkillish basement rig (which, thanks to mijknahs, now includes a Mcintosh mc2505) and it sounds just fine at reasonable volume. It is, however, big, heavy and wife-frightening and would never, ever be allowed in the bedroom.