We've been waiting for years for an ASDA store - the planning was delayed by a lengthy dispute - but we're getting one next year, finally!
Tesco is easily the nearest store, but I'll happily travel farther to go to ASDA. I don't rate Morrisons, Co-op is basically corner shop prices, as is Waitrose (and then some) and a weekly shop at Sainsburys always seems to come out £20-£30 more expensive than normal for no apparent reason.
In short: As soon as ASDA opens, I'll never darken Tesco's doorway again.