Wonderful items you have! I use mainly Premo and Fimo Soft and Fimo Effects. I have only used Kato 1-2 times and remember it was a bugger to condintion.
I needed to mix 3 different colors together to make a large batch of custom flesh color and used a food processor that I picked up at Walmart for only $25. I found that it not only chopped everything up into tiny little clay bits it warmed the clay in the process as well. That cut the conditioning time down to nothing! That might work well for those that like Kato and Fimo Classic.
I also like Kato liquid for gluing, sealing, glazing, painting, you name it. I especially like the fact that as a glaze it is very glossy and seems to be the most economical.
My local Michaels carries a decent amount of supplies but they don't really have any support or knowledgeable people on staff. I have found YouTube to be an invaluable source for free tutorials. Also, just Googling polymer clay has net me a lot of web sites that offer free tips, tricks and tutorials that are helpful.
This website is Fantastic with all kinds of info.
http://www.polymerclaycentral.com/index.htmlAnd last, Munros Crafts in Michigan is a great source for supplies. I'm lucky enough to live only 30 minutes away but they do mail order as well.
http://www.munrocrafts.com