Originally Posted by
guadzilla
I take it there that within these two extremes, there is a range of tension options, each of which results in a wheel with a different feel but is still functional?
Yes, and that range of acceptable tensions gets narrower as the rim gets lighter/weaker (needs lower tension) and as the number of spokes decreases (needs higher tension).
To the OP, I'm sure Shimano has the tension range in a shop manual somewhere, but they might not be willing to share it with an amateur and instead tell you to find a shop that services their products. I thought those wheels used a proprietary spoke wrench anyway.