Coffee brand can make a huge difference. For the longest time, I was addicted a brand that Shaw's used to carry, called Hawaiian Gold Kona Coffee. It wasn't pure Kona, but it was a very tasty mild coffee and the price was right.
When all else fails, I brew Breakfast Blend. In fact, if all else fails, I usually resort to Breakfast Blend, regardless of the brand.
For a 6 cup pot, I usually measure 3 level tablespoons + a smigeon. 5 level tablespoons + a smigeon for 12 cups. I don't know why, but without that smigeon, the coffee tastes a little weak, but is perfect otherwise.
I've seen those K-Cup machines...it's fine if you want one good cup of coffee once in awhile. But for the coffee junkie like me that goes through 3+ cups every morning...it's not very cost-effective.