With that budget I would go with a M10 or M11. There is also the Sten's and Reising's, I'm not as familiar with these two so not sure about parts etc. I would try and find a rental place and rent a M10 or 11 and give it a try first. They aren't for everyone as I just don't like the feel of them and ended up with an UZI as my first. If you haven't done any NFA stuff I would recommend buying from a reputable dealer as it will make the process a lot easier for your first time. You will pay a little more but you will have the piece of mind that your $$$$ aren't on there way to Nigeria. Not to say everyone is out to scam you but there are a lot if you don't know what to ask and what to look for. If you can find a local deal that would be even better as you can look and touch the firearm before purchase. Another thing is right now the wait is going to be a minimum of a year unless something changes which I don't see happening so keep that in mind.