I recommend something like btcguild which has the largest share of the pie so you can certainly see a payout.  What the other guy was pointing out above is that "in theory" you should get the same amount of coin given:

your pool isn't too small
your fees are zero percent
You can merge mine for a little bonus in extra coin to be gained



However I think that in practice, larger pools solve more blocks more often than smaller pools and so you may see a larger payout from having more hashpower on a smaller pool but the amount of blocks solved is likely to be smaller per day and thus your payouts will be less.  This is my opinion and I am looking for a more clear answer as well which is why I decided to share my experience.