seriously, this is as addictive as cigars... that said, grinders are the MOST important part of a coffee setup, I use baratza grinders, I love my virtuoso for coffee and preciso for espresso, I also have some hand grinders. you dont have to pay a fortune for a good grinder, taht is what baratza is all about as a brand. they have a $130 entry level grinder that is pretty good. I like the burr set on the grinders I have, though they do require some watching as the plastic parts tend to wear more quickly than some of the more industrial grinders I've had (Rancillio Rocky, Gaggia MDF) who's internals are all metal. These produce a better grind overall though.
believe me, this can get out of hand, but it's worth it.