"leaking" from around the headgasket are is common on hondas. they usually leak from the distributor o ring, or the cam seal on that side of the motor an it pools up by the tranny.

if your car isnt smoking or overheating, dont replace the headgasket IMO.

if you want to run a thicker headgasket, thats fine, get ARP headstuds, but make sure you machine the head flat. But i think its a waste of money to run thicker headgaskets, that acutally INCREASES the chance of blowing a headgasket