Herbert Solid Roller Lifters?

I don't see myself going over .600 lift with the current heads I have for this 340 build so the lower cost ones would probably get me by. They are ProMaxx 171s and supposed to flow 251-254 @.500-.600" so doesn't make sense at this point to lift it higher. If I can find someone to do it, I might get them touched up to get into the 285 cfm area. The recommendation I got from from Jones for a SFT was 244/252 @.050" .365"/.364" Lobe Lift (.584"/.582" @1.6 ratio) 108 LSA. I'm struggling with taking the jump to a roller setup because a SFT would probably do 90% of what I can handle. But like the guy in the Dirty Harry movie said, "I gots to know". The roller should provide more area under the curve, and thus more power for a given lift?
I don't know if it affects anything but this is not going to be a drag race motor. It will be driven on the street as much as I can and see road course and Auto-X tracks as often as I can. I'm looking for something that will generate good mid-range for coming of the corners but rev and have good top end. I have a Milodon gear drive and am looking at chasing down a set of T&D shaft mount rockers, but I'm not sure they are worth the effort to mill the stands off in order to implement them. I've got 1 3/4" Hooker headers and while I'll start out with an Air Gap, at some point I'm going to play with an Edelbrock TR5 Tunnel Ram. I'm trying to use the best quality parts I can afford and put it together intelligently, which is the bigger challenge. Too much time on my hands to think, with this cold weather. Can't wait for a warm up to get some of this in motion.