Over a dozen bonefish trips in almost 20 years I've fished the 9wt, the 8wt and now the H2 T&T 7wt (which is pretty close to my 8wt down at the butt). I even did a whole trip with the two-hander. Although I've hooked fish that were too much for my 9wt the majority are great on the 7wt T&T and it's my first choice now.
Conclusion FWIW - the only reason you need more than a SW grade 7wt is wind; otherwise it's all on the reel. The Danielsson 7ten with several miles
of 50# gelspun does the trick for me. The lighter line is also more stealthy and distance is rarely the issue if you use your head.
BTW - where are you going? (the venue often has an influence on rod choice)