If you are looking for an Eotech style reticle (65 MOA big circle and small center dot) then Holosun is what you seek. Don't let the Holosun name fool you, they are the real deal.
Sage Dynamics has beat the bejesus out of them and they have held up really really well. 507, 508, 509 are all great. The solar panels are more than a gimmick, they actually work and extend the battery life out significantly.
All of the recent versions you can change the battery without removing optic from the gun.
Downside is they are China made - that deters a lot of people. Sadly there is not anything like it domestically made...yet.
If you want to buy American and want rugged, stick with whatever gen Trijicon RMR is the most recent gen. If you want a mostly rugged version of the RMR but geared more towards competition, check out the SRO.
Suppressor sights are a personal choice. I put them on mine - it just makes me feel a little better having a backup sight if needed. Lots of guys take the sights off completely or just leave the stock/low sights on and call it a day.