what hydrolic breaks to get ?

sigorman85

hi my mate wants to get some hydrolic breaks for his specialized hard rock im not that clued up on it all yet.basicly he has a budget of £100 i no this is not a lot but there is some good bargins out there on some site. we do about 40-60 miles a month of xc its not alot i no! he has cable disk breaks at the mo
basicly whats ideal for this bike?