What kind of steels are you going to be sharpening what's your hardest steel to sharpen that you own or are planning on getting in the future.
The Congress Silicon carbide stone's aren't bad for the money but they were fairly quick if you sharpen a lot and mine wore out faster then my Tsprof stones.
If you want really good stones google jendeindustries and look at the Sigma Power stones they sell,look at the Sigma Power Select 2 stones they are the faster cutting stones,I have their 6 10 and 13K stones and they great polishing stones,if you use diamonds first you won't get a true mirror polish that is 100% scratch free but it will be a nice polish though.
I would also look at getting some Venev stones if you have a lot of steels like M390 M4 S30V S35VN S110V,that's where diamonds are needed in the lower grit's and then it's not so important with the higher grit's.
I would get the Venev stones that are mounted on blanks myself I like the mounted format the best for whatever reason,you would be safe to get the 40 to 400 grit in the original bond and then get the 800 and 1200 in the OCB bond and don't touch the 2000 grit stone.
The problem with the 800 1200 and 2000 grit Venev stones in the original bond is people were not happy with the scratch pattern and they had problems with diamonds falling out as well,they fixed the 800 and 1200 grit stones and they are excellent stones to use,they are rated FEPA grit and if you want I can email you a grit conversion chart I have,I think a 2000 grit FEPA stone is the same as a 15k Japanese water stone.
Go to Gritomatic and look under brands and look for Venev and you'll see they have a stone that's more pale yellow or brown that's the 800 an 1200 grit stones in the OCB you want to look at in the their higher grit's.
I use Silicon Carbide powder to refresh my stones and I was stop at 2 grit's below the stones rating for the last grit of Silicon Carbide powder,the reason that is because if you use the same grit or even one size lower the Silicon Carbide can become lodged in stones because it's to close to the same grit and then rust.
If you are looking at the Naniwa Chosera stones they are not that great for cutting steels like the ones I mentioned and they tend to glaze over after 1 to 2 use's and then you need to use a Medium grit Rust Eraser found on ebay to de-glaze them so they will cut again,you can get the Rust Eraser on ebay it's a block of grey rubber with grit in it,the Chosera higher grit's are good for polishing but don't cut so well on steels with 4% or more Vanadium in them.
I think Edge Pro and Gritomatic and Jende might sell the blanks,I use 3M Super 77 spray and if you want to reuse the blank you just need to pry the stone off and then use some contact cement remover or lighter fluid to remove the glue,I know the 3M stuff is what Edge Pro and Jende use to mount stones and I don't know if you can remove the Scotch stuff I have never used it before.
I think Gritomatic has an Amazon store in the USA I'm in Canada so I can't confirm it,I know Konstantin the owner pretty well and he is a good stand up guy and is very helpful with his customers on helping them get the right thing's.
If i were to get some stones and aluminum blanks, how do i put them together? Epoxy? Glue? Which one would it be? Thanks in advance!
, makes my KME look like a child's toy. Any videos available on it? You have my curiosity peaked sir 
