One line is great, they have the background info of the bean sources on the bags and they actually build relationships with the farmers in the areas they source from. I usually go to imperio which is a little bit north on high because they usually have beans that have been roasted more recently. I usually buy 1/2 Lbs at a time and it is usually roasted less than a week before I use them.
in columbus greater the local roasters that I know of are:
Stauffs and Lucky brothers in GV.
Impero and One line coffee in the SN.
Mission Coffee company in SN has a roaster they work with based out of Cinci.
Cafe Brioso Downtown
Backroom coffee roasters in UA.
Upper Cup in OTE
Also I have this thermometer for seeing what temp my water is. I typically bring to a boil and let it fall to around 180-190F http://amzn.to/VksWOT