In search of the strongest black tea out there. I know very little about teas other than they're better for you than coffee and that coffee eventually gives me withdrawl headaches (because I drink too much but absolutly need the caffeine). Taking suggestions, explanations, etc...on which teas are best (brands, types, etc...) that come in a teabag (don't have time for the loose leaves) and where they can be found (Union Sq. area or downtown financial area most convenient...downtown Brooklyn ok too). Thanks!