Yep, the Mepro reflex sights are pretty nice, but I picked up a used Sig Sauer STS-081 Red Dot (a real one -not a clone) at the Lakeland gun show today for $100. ...it even has a new Killflash on it. It's in great shape, but the mounting nut is stripped. Nothing I can't fix...I'll just drill it out & silver solder a stainless steel well-nut, or a small heli-coil into the stripped piece, use a stainless cap screw, and it will be stronger than stock.
Just what I was looking for, and for a price I was happy to pay. It's perfect for the rail; small, light, & the dot is super-clean....I was amazed at how clear the image is through this sight - even with the Killflash mounted. Looking forward to getting it out to the range.