Ok, this is a prime example of why any attempt to make a detailed list of shops in Akiba is next to impossible. You see, there is this one building, that has more anime and model shops in it than your average American city. I could try to break it down by shop, and what they carry, and what kinds of things you can expect to find there, but it would be a waist of both my time and yours. The reality is that if you are looking for any sort of anime-related good, and you are in Tokyo, then it is worth your time to go to Akiba, and if you are in Akiba, then it is worth your time to start at the bottom of the Radikan Building, and just browse all the shops in there. There are a few Kotobukiya shops, a couple of Yellow Submarine's, K-Books, Kaiyodo, Volks, various collector toy places, and just all sorts of stuff. You should just go and look around, and chances are you are going to find something that will make you happy you spent the time to check it all out. Personally, I found the most effective way to do it, was to start at the bottom, go to the top, looking at everything without buying, then work my way back down picking up the things I knew I couldn't live without. Of course my trip came up on short notice, so I didn't have much spending money. If you have a fat wallet, and aren't in any danger of running out of money, then just buy up everything you like in one pass!
I am a modeler, animator, designer director, and avid anime freak. I have been working with computer graphics and digital imaging as long as I can remember, and I still love it. I have worked in stage, television, video games, film and even the darkest bowels of corporate America. These days I gravitate to more personal projects, and anything that sounds like fun.