22RF is the best place to start. I have an AAC Element.

You can do the cleaning yourself...just got to make the "dip". Caustic stuff, gotta be careful, but no need to send it in.

The glory of Thunderbeast is repeatability. If accuracy is your game, they have a great offering. If you just want to fire off a bunch of rounds for fun / plinking...you could get away with much less.

Suppressors really are a game of buy once cry once, though. You are buying a life asset...not something you'll really want to sell off later. The stamp is an economic incentive to keep any Class III items....so get what you want, save up for the best if you have to.