cz cheap as chips , 500 quid get you a new one with a scope + mod , last a lifetime . bolt action more reliable no cleaning (big plus) most popular bipod is a harris 9 - 13 swivel . have fun .
cz 452 for me , if you can get yourself a new one it will last a lifetime with practicly no maintainance . headshots @ 100 yards (but most shots around 50 / yards)