Admiral seem to be fairly good if you pay up front. Always give me the cheapest quote. Direct line on the other hand hiked my qute on a 2.5 mondeo from £500 to £800 because "my area had become bad for crime" - 2 months later I moved to another area and they upped my premium by another £200 saying "you must have gone from a low crime area to a high crime area". Ridiculous.
Now I'm paying just slightly more on my 20vT with admiral than I was on the 2.5 mondeo with direct line.