I have a lot of difficulty telling the difference between the TASTES of different DECENT BRAND NAME coffees. I can tell when one is stronger/weaker than another, but unless it's real sewer water I buy whatever's on sale
Starbucks (any), and like smurray says there are great deals on the whole bean @ Costco -- you grind after the checkstand.
Peete's. Pretty strong so we just use less.
Seattle's Best. Good enuf for me.
SF Coffee Company. Probably someone else's rebranded, but it's OK to me.
I tend not to like any of the fast food style coffees, though.