What about
:
http://www.machinemart.co.uk/shop/pr...ive-socket-set
Buy that to start with and then get other bits as needed? E.g. breaker bar and spark plug sockets, i could get them individually from Halfords, again with the lifetime warranty.
Then I'll still have the lifetime warranty that I'm after, ill have a 1/2 drive socket set which goes from 8-32mm with a reversible ratchet and i can slowly build up my tool collection, it will possibly cost a bit more than a larger set, but it means i can spread out the cost and only buy the tools i actually need.
I'm not too keen on buying a socket set on-line with a lifetime warranty as it'll be much harder to take the bit back to get replaced.