You have to remember there is this here contingent of guys here who have this thing about BIG razors.

Remember that a 5/8s razor was considered the standard for probably at least 100 years and its what barbers used to shave everybody. My own experience has shown me that you can get as good a shave from a 4/8s as an 8/8s. The experience is different.

My suggestion is to start with either 5/8s or 6/8s and see how you like it and then go up or down for your next until you decide if you want to join the BIG razor club.