yea... q/a fits better.
there is no such thing as the "best" kernel.
ideally there should be one, but reality is different.
im saying that cuz not all evo's are 100% the same, not all users use the phone in the same way, not all locations have the same conditions, etc. etc.
try one, if u happy with it... stick to it... if not, move on to another one until u find one that u happy with.
the only thing to keep in mind is that u would like to give each kernel u try a good 3-4 days before even thinking about switching just because u can't judge battery life after only a few hours or even a day or two... u would need to wait it out.