Surely the important point is that it is a 65cm dish. This is very small for H-line, around 3 wavelengths. Before buying I would read the articles "Hydrogen line observations: from frugal to advanced" on the Astropeiler website??(edit the url for parts 1-3). This gives an idea of the resolution that can be expected from a dish of this size compared to other solutions. Personally I have used a corner reflector as being easy to make and giving a better performance than very small dishes (due to good sidelobe performance so there is lower noise pickup). I also have a mesh dish wifi antenna that was going to expand to a 90cm diameter and fit with a dipole + reflector feed. In theory that will be better than both the above options with lower wing resistance so easier mounting.
