You'll see improved performance over the six. Think, enough to get a solid lock on any that are marginal on the 6, but those that you absolutely don't get now may still be a problem.
But as far as between a mesh or solid panel, I think the performance variable is in the quality of the build, Parabolic accuracy, mechanical rigidity, is everything. Options: In another thread, Mike Kohl stated that the tooling for the SAMI was acquired, and production should be resuming shortly. A 10 isn't that much larger than an 8. Then there's hunting for one in the wild.