Thanks for all of the input. I did some research on all of the optics that were recommended. In the end, I was looking for "low budget", not really because of my budget but rather to use something as a "proof of concept".
I found Wanstall's had the TRS-25 with a high riser (which I think should co-witness with my front sight) for $105. At that price is seems like my downside is minimal, so I pulled the trigger. I think it will suit my initial needs and if I want to upgrade down the road, I won't lose much.
Thanks to all for your advise.