Turn off caps first.
Speed is not the most important factor... but I had a Bear TRX and the bow really was not very good for anything other then hunting, I hated shooting it.
You can either look for a used bow that is a much higher end name like Bowtech, Hoyt, Mathews... etc
There are a LOT of really impressive bows under 400.00 new now that would blow the Brute and the TRX way out of the water, you shouldn't need new accessories as you already have those from your current bow.
No I'm not dead