It's a very simple process. Unless you plan on making insane power, theres really no need to upgrade. Aftermarket, Performance axle's are three times the price of OEM. I've seen some cost up to $1000. Just search for OEM.

15 minute axle D.I.Y. -- (If you lack mechanical knowledge, don't expect it to go this quick.)
https://www.honda-acura.net/forums/s...d.php?t=173647