Re: Please recommend wading boot
The general rule is to go up one size to accommodate the extra volume that a neoprene bootie will take up. Some boot companies may build the extra volume into the boots and size them that way. For best results, try a set of boots on with the waders and socks that you plan on using.
I really don't think that there is a good boot out on the market that gives proper support. For that, an aftermarket insole will make the difference. Insert a set of Superfeet insoles in your wading boots. They will cradle your feet inside your boots. I wear them in all my footwear (except for sandals) from cycling shoes to ski boots to wading boots. They make a difference by supporting the bone structure of your foot which helps align your ankles, knees, and hips.
In regards to rubber soles, I think the Streamtread Vibram technology is the best rubber sole on the market. It isn't perfect, but it is better than a few boots that I had a chance to try out. For increased grip, optional studs can be installed.