I know I'm reviving an old thread, but there is so much good information I thought I'd bump it and add my own 2 cents.
I only buy Earl Grey loose tea. My wife likes variety and so I end up drinking Lipton and Yorkshire, also. I buy my tea online here,
Coffee Bean Direct, a kilo at a time. I find it to be very good, on par with Yorkshire and Twinings.
When brewing, I've found the most important thing for me is to set a timer at four minutes so my brew doesn't get bitter. No milk, but I do like my sugar, and this is where I'll be burned as a heretic, I make Earl Grey iced tea. It's the best.