Assuming you have your stropping technique mastered you might upgrade with a better strop and pick up some chrom ox from Chris L in the classifieds here. Paste your starter strop with the chrom ox and only use it when the edge needs refreshing. Or get the chrom ox and some balsa wood and make a flat hone. Here is one post describing it with a link to another. The second post by Slartibartfast has photos and details.

You could buy a barber hone but it will need to be flattened. That is a lot of work but it is something you could do yourself if you wanted to take the time. The Norton 4/8 is a great stone IME but if you don't have the time or the inclination to learn to hone your own I think it would be a waste of money for you. Same with the barber hone really.