The best value in the market place in my opinion is the new Stanley Fat Max L-ion Drill, currently on sale at Argos for £99.99, I was total amazed by the build and performance of Stanley's first offering when I tested it recently. At the current price it's a steal!
Stanley UK - 18V Hammer Drill
Stanley FatMax 18V Cordless Hammer Drill - YouTube
You will need to cut/paste the 'link' below as system doesn't like it:
http://www.argos.co.uk/static/Product/partNumber/7114360.htm?CMPID=GS001&_$ja=tsid:11527|cc:|prd:71 14360|cat:home+and+garden+%2F+diy+tools+and+power+ tools+%2F+diy+power+tools+%2F+drills+%2F