HI mate
I spent money updating my inferno for rec ball, but it was nearly 3 years before I moved into tourney. The nice thing about upgrading an inferno is that you can still use it on a normal rec-ball day with work mates, etc, which is why I still have it.
http://members.lycos.co.uk/yorkshirerams/video/inferno.jpg
Updates enhanced volume chamber, vertical expansion chamber, venturi bolt, Dye Xcel 14"barrel, Heat double trigger and Thumbwheel velocity adjuster.
I'm not one for buying second hand, but a lot of people and team mates have bought pre-owned markers. A lot of good equipment at cheap prices, so consider this route if you are short of cash and want to step up. Go to a local walk on and check out all markers there, most people don't mind you having a quick test fire.