Here's something that might give you an idea or two on acoustic treatment.
https://www.youtube.com/watch?v=02qpJt0hsL0 As far as speakers go, it's not about "Speakers that bump" they have to be able to tell you what's going on in the song and be able to help you get your music to sound the same on a variety of systems. If you can work with the ones you have I say keep up with them. I'd also recommend a low cost pair of studio headphones. I got the SHURE SRH240a's and they're really good and haven't let me down yet. Especially for $60 you can't really beat it. A Midi controller helps quite a bit, for a low cost drum pad type controller the Launchpad seems like a great option, I want one.
Novation Launchpad | Sweetwater.com and for Keyboard controllers
the M-Audio Oxygen 25 is also one I want,
M-Audio Oxygen 25 | Sweetwater.com I have the Akai Professional SynthStation25 but the keys are a little bit too small so I'm looking to upgrade to that. But yea those are my recommendations.