As somebody who owns and uses all those stones I have bad news for you....

It does not matter which of those sets you get....

Honest I think Jimmy has used this quote before in cases like this, "Sometimes it is the Indian not the Bow that shoots the arrow"

The only change to your plan I wuld make if I were you, is if you go for the Norton set, get the whole set, it should run about $120 for the 220/1k the 4/8 and the Norton Lapping stone... This will set you up for the future better in case you happen to want to start buying razors off E-bay "heaven forbid you catch RAD"

Any of those 3 choices will work Honest they really will...