So...a minor update to my quest. But first, a big thanks to everyone for chiming in with suggestions! I really do appreciate the variety of opinions and experiences. Anyway...on Friday I was looking around for other possible solutions, including something like an Orange Tiny Terror and speaker cab. It occurred to me that the reason my HRD cannot truly produce a tight OD sound is because of the open back, and just getting a speaker cab with closed back might help. So I ordered an extension cabinet, relatively inexpensive way of experimenting with my sound, and worse comes to worse, I just have more of my HRD's typical sound (which I like! I love that loose/spongy bottom end a la Neil Young!). And I can try it as a combo of external and internal, or just plug the external into the normal internal speaker jack. And if it really does nothing for me, I'll just return the cabinet. Either way, I will continue my search for a true modern-sounding amp. I have more guitars than I can play at any one time, why not have a couple of amps? Co-incidentally (or is it!), my clean channel has decided to completely cut out on the HRD. Lead channel sounds normal. I didn't have time to play with it last night, but I suspect either a bad or loose preamp tube. I've unplugged it and will diagnose tonight. I'll start by swapping the pre-amp tubes for the clean and lead channels. The tubes have lasted 15 years, so I suppose this was expected... I will still look into trying an Archon, or a H&K, or any of the other suggestions. The Archon is certainly top of my list, but I will continue to be open to other ideas... I just really wish there was a guitar store around here that carried a good variety of the amps being suggested.