Wow. That actually sounds great for just showcasing the preamp. Once the whole thing gets set up, no doubt it will be great. Even though all of us attempt to emulate the sound of Jerry, we all still end up sounding different from each other. Your tone sounds very similar to mine, so I guess that is why I really like it. The only suggestion I have would be to maybe add a clean boost to the front of the preamp, or turn the gain/volume up to make the channel a little dirtier. Doing this gets you a pretty good 77 tone which I always seem to gravitate towards. I think your mids are fine, the treble though can always be turned up higher
Seems like you made a great buy with the H&K. Working on my rack rig now. Just waiting on my Sarno preamp and lexicon mx400. Can't wait to get it set up, take some pics and post them along with some audio clips.