t-blackbourn

Hi guys, I'm new to trials and so this site, and am turning 17 in a few months. I don't yet have a trials bike and I was wondering if anyone could help me with what to look for? Should I be looking at street trials bikes or the more 'competition' style ones? I own a BMX as well as my mountain bike, but it's not really my scene/style of riding so it gets very little use, and for years I've wanted to get properly into trials (though I'm not sure I would ever/often compete). I think the very most could spend would be £600 at a push - could anyone recommend places to look, or what I should be aiming to get? Thanks in advance, Tom