Cayugad, that is the exact setup I am going to try this spring. I have the Lyman peep mounted. I got the Lyman front sight from Shenandoah on DWB's. It didn't come with the + insert, but I am going to order the insert soon.

http://www.brownells.com/aspx/ns/store/ProductDetail.aspx?p=12372&title=GLOBE+SIGHT+I NSERTS

Like you question, the big downfall from what I have heard is in low light.