I have recently upgraded from Kgo's to a variable voltage battery (Vision Spinner) and have been very satisfied. I am considering an iTaste box mod right now. They are very affordable and I have a few friends that love them. I see a lot of good reviews online too.
I have never been to Buckeye Vapor, but have heard good things. I have used Alt Smoke on north High St. though. They are great and have some good prices on their batteries.
As for liquid, I only use http://www.mtbakervapor.com. I have tried liquid from MANY vendors and they by far have the best flavors, best prices and best selection imo. You also get a random flavor tossed in for free with every $15 spent.