Only tried them on other people's bikes, but I always find them really fat.
Halfords grips for me - you get four tubes for £5, and each tube gets cut in half to make a pair of grips.
Some halfords stock the old ones still, but the Loughborough one has these new ones. They're a bit thicker and harder, but after a few rides they mould to your hands and start to thin down a bit.
In my experience, I've found them the comfiest and grippiest, not to mention cheapest
On the downside, the old ones rip, if you get them. The new compound seems better for not ripping however.