I think you need to evaluate what you are really after when it comes to your upkeep. For example, if you are interested in keeping a good edge, but will probably send your razors out to a honemeister, then a barber's hone is all you'll ever need.

If you think you may want to delve into honing on a larger level, then the 4/8 combo will be the better buy.

As for your second razor, I would recommend getting something that you know you'll shave with and enjoy. Having two razors of the same grind will help your technique, and touch-ups. Then with your third, try something different, because if it fails miserably and you don't enjoy it, you still have two nice ones that you'll use often.

My thoughts.