What will your overall engine combo be? Will you rebuild stock or will you be modifying your motor (or is it already modified)?
Without knowing any of the above, I venture to guess that you will not need the H-beam rods and that the Eagle I-beam's will suit you fine. Supposedly good to 700HP. Unless you will have more than, say, 600+ HP then the H-Beam rods will cost more, be overkill and will increase your balancing costs slightly.
I have a set of Super Cobra Jet rods with a polished beam section if you're interested...they won't suit any of my upcoming builds...
LO
ps: Also, what are you running for an oil pan?