Re: I value your opinion..please...
seems to me your loading the box with the same tools. If you're currently happy with your three and 4 wts, then why get the superfine in the same sizes?
I'd say go with a different size rod, 5 or 6 (do they make them that big?) to expand your fishing capabilities.
If you have access to water that will require a 5 wt, then why not do that?
If you upgrading the quality, then you need to shift one or more of the others....