i cant recomend a specific bike, but:
u need:
1. something that is light but you feel very comfortable on
2. something with real good brakes(linear pull, disc brakes)
3.something that fits you either very well, or, something that is slightly small.
and
you need to decide if you want a trials bike with gears or one gear.
look around and post the spec of the bikes you have found. im sure someone will ber more help than me.