I am also in the beginning stages of ownership. As I have mentioned I am purchasing a Sten Mk. II. Like HK, I am particularly fond of WWII infantry weapons and the Sten fits in with that. I went to my local dealer to discuss the purchase of a suppressor. He mentioned that he had the opportunity to get two transferable Stens, would I be interested. Well, of course I had thought about getting a subgun for years. So, I figured now is the time. I have paid for the gun so far. He hasn't gotten it in yet and therefore, I haven't started the paperwork yet. I am seriously considering getting a suppressed Ruger MK. II possibly as soon as next week (getting the ball rolling, not actually getting one by next week). Three reasons for the hurry. #1) I have been getting a lot of overtime at work and have the money. #2) We currently have a sheriff who will sign the paperwork without any undue BS; however the election is next month and who knows what will happen. I doubt that it will change much either way, but why take the chance ? #3) I was thinking that I could take both sets of paperwork (Sten and MKII) to the sheriff's office at once. That may be a bad idea, I don't know.
When I actually take possession of the subgun, I would like to compete in the local machine gun matches. Probably will spend most of my shooting time running through senarios similar to IPSC or IDPA. Over the years I have fired quite a few different full auto weapons including a short stint in the military, so the novelty will be in actually owning one myself and being able to enjoy shooting it in the way that I see fit. Every other FA I have fired has been under close supervision with someone telling you exactly what and how you are going to shoot it.
As far as the suppressed .22 pistol, I guess the limit is my imagination. Shooting in areas that are safe, but close to civilization. Shooting without hearing protection. Shooting at campgrounds. Whatever. .22 pistols are extremly versitile and having one that doesn't make a lot of noise only makes it more so.