You can get more range out of the basic BC rear peep (WGRS) by putting spacer material under the sight base. You will need longer screws is all. It is easy enough, but not precise, to dial in elevation, and a caliper measurement will make it much more repeatable than eyeballin'. The windage is more problematic, but you can use Kentucky Windage and hold over fairly well.
Beware, cheap tang sights are usually a disappointment.
The Smith 'Rough & Ready (Rem. style)' is good when in the up position, but the open sight will be too close to the eye for most (many for sure, especially older shooters) to really see properly. If I had one I would prefer having a normal barrel mounted open sight visible with the Smith down for 50-100yd. (and the right height front to work with both).