It is only in the last 3 years that astigmatism has been a problem for me. Last time I looked through an Eotech Heliograph sight, it was not starry, that was about 2 years ago. The triangle in the Trijicon's are sharp as, yes different type of sight.

Nitox if possible try several different sights. If nothing else just in a store. Nowadays there are quite a few good quality Red Dot sights about it may be difficult to chose just one.