Help with cam selection

For pistons - I'd say go dished and keep the static lower. Then you'll be ready for better heads and compression isn't as big a deal for your needs.
I think if you want to stay with Comp then something like the XR274R is more appropriate. Unless the ports are really well done (and completely ported) anything more than that is probably a waste of lift and the extra duration will hurt the low and midranges to some extent. That family of lobes uses a milder spring too which will help the street duty. You will still need to cut the spring seats and guides to get it to work but that's nothing out of the ordinary.