Intake Manifolds

I've just been doing some more reading and I have a question concerning intakes. I found information on edelbrock, weiand but nothing really on the offenhauser intakes, are they a good intake for low to midrange torque and all around drive ability?

How many of these “Other” intake manifolds do you see on cars and for sale. That alone should answer your question!

Your interested in 1 of the 4 intakes below:

RPM/RPM-AG
Performer
Stealth
Action Plus

Alternatives are;

OEM 4bbl
LD-340