Thanks Hookster for your reply.
I was considering red dots, either the Trijicon RMR or the EOTech 512. But would also like to have the ability to use my irons, so I don't know if I could get either a see-thru base, or a very low mount on the RMR, so that I could co-witness between the irons and the HWS.
All your comments are more than welcome!