personally, a lot of people I have spoken to don't rate the seaclone very high. so I would avoid this one. I have never heard or seen the penguin so I can't comment.
why don't you wait and get the large skimmer first, then you don't waste any money. while the tank is maturing with or without live rock, you shouldn't have your your skimmer on. i would set-up the tank and leave it to mature for at least a month with no lights on as this will reduce the affect of an algae bloom. then, when you get the skimmer, leave it another week with the skimmer on and then add cleaners. hermits at first then on to things like starfish and shrimps.