I am also in the market for 8wt for those exact species. Until last week the Orvis H2 was the top pick. However, it was now replaced by the Hardy Zenith or the Proaxis. I think Zenith or Proaxis have the NRX and the Helios features in them and cost less as well.
I might get the Zenith since I fish more freshwater than salt. I called Hardy and Stillwaterflyshop and they both said that the freshwater Zenith was ok for light saltwater usage and their 8wt come in 9ft, 9.6ft and 10ft. Me, personally is going for either the 9 or the 9.5ft for roll casting from the shore.
Hardy Fly - Products - Flyfishing Rods - SINTRIX Flyfishing Rods - Zenith
BEWARE...Once you switched, you can't switch back. :
and NO, I am not an expert, I just think like one.