The new Stanley FatMax is worth a look, I was amazed at how good it is considering this is Stanley's first offering. It's on sale at Argos for only £99.99!
Stanley UK - 18V Hammer Drill
Stanley FatMax 18V Cordless Hammer Drill - YouTube
You will need to cut/paste the 'link' below as the forum 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
My 4ah batteries go on foreverDon't bother with anything under 3ah. I'm using the 4ah dewalts twin pack good kit git mine from my tool shed
I use makita 14.4v 3.0ah sds drill and impact driver.cant fault then battery last ok but with a 20 min charger your not with a battery for long.
I'm a makita man, bhp451. The good thing about the makita 18v is the vast range of other tools on the same battery platform. The bad points were the early makita batteries had a few problems if not recharged regularly but has improved (and so hass their customer response to this).
If you're going to spend more check out milwaukee. Did have a look at the new bosch cool battery range and if you look into their brushless tech marketing it is impressive, makita do brushless too but I have not tried either of these as a user so can't validate their hype,.
If you want to spend less then look at the Ryobi One range.
Had 453 for two year now without any problems but better since I had metal chuck put on! Just a shame about the batteries as one has just died!