I agree with Cirrus, Irazola Techno I think are the best that I have used. They are a Spanish brand.
Here's a really good price for some (mine cost about £35 I think)
Irazola tekno plus insulated screwdriver set 202031 tool, tools, bahco, Irazola,stanley draper :: Toolman Yardley tools, toolman yardley, homepage,bahco, stanley, estwing,stabila, marshalltown, bosch, knipex, trend, irwin,draper, fluke, monument, kam
This company supply others and I have bought alot of tools from this company. They are based in Yardley, Birmingham on the Coventry Road towards the NEC and there shop is like a sweet shop for adults. Great place for buying branded tools at the right price. I am sure they post goods out.
Of course it is personal preference, I guess it depends on your line of work? Personally I don't like hard plastic handles because they tend to slip when your hands get sweaty.
I have had a set of Wera drivers and they tended to round off quite quickly in my opinion. Tips must be a bit soft.
Draper Pro Drivers are quite nice because they have a soft grip which is great for extra grip.
Hope this helps!