You suggested the A & H 320 as a medium priced choice for a beginner.
This is a beautiful gun and shoots great. Unfortunately for a beginner it is very heavy and very hard to clean. Also, I've experienced problems with a weak hammer spring. Two other A & H owners at my gun club have also had similar problems with the spring.
The Austin & Halleck is long, and actually has a full 26" of usable barrel length from muzzle to breech-- the only guns I've tested that do. It feels heavy, but it is actually lighter than my Encore, Savage, and an Optima, on my electronic scale. I've found them to be extremely soft shooters as a result.
It does take an extra step to clean-- but it has a quick release bolt that helps out. The breech plug takes two steps, but just one bolt frees the entire barreled action. Due to its open breech, it is legal to hunt with in some western states where closed actions are not, and the standard 3 way ignition addresses that. I like the idea that it comes with a good, American made trigger, and things you don't normally buy a muzzleloader for-- like a good ramrod and manuals. By redoing all their manuals, the information is there to make a new shooter's experience relatively easy-- compared to the skimpy manuals provided by some companies that tell you very, very little.
The Weston, Missouri produced A & H's had a variety of QC problems, including weak hammer springs, sight problems. The "new" Austin & Halleck, div. of North American Arms, has really turned that around-- even though they have only been around for two years. Even though they didn't make the QC plagued Weston, Mo. guns, they have warrantied them all. As a result, it's like a new company-- and their sales jumped nearly 100% last year as a result.
No way would I have suggested the A & H of a couple years ago. But today, with the combination of soft shooting, excellent accuracy (in the three A & H's I've tested), and a new standard of quality control-- they are certainly worth a look. For those that like the look and feel of curly maple in an inline-- the 420 is the only game in town.
I suppose the distinction needs to be made between a new muzzleloading enthusiast, and a new shooter altogether. For absolute super easy maintenance, it is hard to top an Omega. There just isn't much to learn, or clean. For a bolt-action with a good trigger, that is legal in all 50 states, and shoots softly and well-- the Austin & Halleck is worth a look. They were surprising to me on several levels, but primarily just because they shoot so darn well.