Halfords pro fine so far - I have some sockets (torx, allen and standard 1/2 & 3/8 drive), spanners and possibly a 3/8's ratchet (i think, actually that might be snap on ill check) but I understand they come with a lifetime guarantee so you shouldnt have any issues with sorting a breakage, been using them for a couple of years now adding individual bits as I need them.
If it is for a specific job - a little more specialist I do go for snap on and teng - think that is psycological though