I have traded through CY Group - very good leverage, service (that's Very important), and I like the Laser platform - no big deal to learn if you really want to. Platform is very fast and versatile once you get the hang of it - full of hot keys to make things Easier.
No training that I know of at CY Group, but call and ask 'Chuck' about that.
I don't bother using the charting that comes with Laser, instead Tradestation OR ESignal.
I don;t know anything about those other 2 groups.
If it's training you're after try Affinity Trading Group on East Coast, have heard quite good things. They have a scalping group training with live sessions.
I had training/experience already, so wasn't really in the market to pay for learning, but if you can find someone good who is willing to teach you/oversee your trading then go for it. I am a great believer that experience is the best teacher, there's no lesson like losing money, I guess that's how most people learn!
good luck, let us know how you get on, and what you find interesting.
Seymour