I did the initial boat testing for these TXs and they are a nice TX.
I wasn't able to do a direct comparison of the new SR410s vs. the MR200 or MR3000, so I can't speak to range of each, but the SR410 didn't seem to have any issues with range.
I will be testing here some more shortly in a Nitro setup and will report back as to the comparision. I know the MRs have a range in my FE boats out past 900 feet. I haven't tried to run the SR410 out that far.
I do know that you definitely want the antenna on the SR410 outside the hull. When I tried it inside the cowling on a fiberglass boat hull, I did lose range.
Hope this helps. This TX definitely has a nice feel, and has a nice range of features for boating.