I'd go with a kickstart set from uklockpickers ,
http://www.uklockpickers.co.uk/oscommer ... la81ouu7r1These are probebley one of the strongest picks on the market that wont snap unlike southord , given the same pick presure .
And for the price you cant go wrong, they have a great varied amount of tension tools of widths & lenghs , you wont find these in any other lockpicking set
Here is there site, take a look for yourself about there pick strengh, all picks are made in usa/canada but they do have a Uk distributor
http://www.sparrowslockpicks.com/