I bought Holosun HS503GU with circle dot and switchable to just a dot, for $150 - lasts a year with battery and has auto shutoff and out on when you move it. Same as high end Romeos but $200 less. Holosun makes the Romeo line.
I have the Crossfire 2 on my 5.56 SBR 11.5. It's very rugged for what it is and the CS from Vortex is phenomenal. On my searches for reviews from PST's to their red dots, they have taken care of their customers from answering questions promptly online to making things right. I plan on adding more of their products as their MRAD is awesome.
Got a Crossfire for my birthday, its feels more solid than I expected for the price. At the moment its on my 870, it'll either stay there or move to my AK once I get an RS Regulate mount. I can definitely see this being my budget RDS of choice to have on a bunch of non-HD guns if this first one holds up.