I can’t decide between the infiltration stick or a cwl309 help me/cwl309 MJ
I have a 309MJ, and it’s pretty much what you’d expect out of a korean lever. It’s the k-stick for the masses, and the mounting plate that comes with has a use in a myriad of k-stick installs, e.g. if you want to move up to a Myoungshin or Taeyoung Fanta down the line. If you’re playing SFV or anime games like Blazblue or Guilty Gear, be prepared to re-learn some; if not all of the stuff you know. The k-sticks shine on 3D fighters.
Also, if you want to spend a little more, Samducksa has a QR series of both of those levers. The Infiltration stick in the QR version is $60 USD, and the 309MJ is around $55. Those can be ordered from either Arcadeshock or Focus Attack, depending on your preference.
All of the 309 are basically Help Me now and no longer what they were before. They all have the same actuator but even the “official” Help Me model, the flat plate 309, no longer has a heavier switch in the up position. Both the 303 and 309 series are also using the same black neck plate, so… not much difference these days.