My vote would be:
Dupuis/Kunitz - Crosby - Kessel
Kessel will be awesome with either, but I think his speed helps Crosby more. Dupuis/Kunitz if healthy will be a decent third wheel. With arguably the best center-winger combo in the NHL, they don't have to do much. Get in on the forecheck and play some defense.
Perron - Malkin - Hornquist
Very close to the shooter-net front winger combo that Malkin has done very well with in the past. Hornquist didn't look great with Malkin, but I don't remember who was on the other side. Malkin needs a guy to play off of and that can be Perron while Hornquist just has to crash the net. Perron's skill, but lack of speed will mesh better with Malkin's east-west game than Crosby's north-south IMO.
Dupuis/Kunitz - Sutter - BB
Surprised they haven't traded Sutter. Maybe they will if not before the season then before the deadline, but in the meantime, they could do worse than surrounding Sutter with some decent wingers. I'm close to giving up on BB, but they have Plotnikov if he doesn't get it together. Dupuis/Kunitz aren't ideal top 6 wingers, but as 3rd line players, they are fine (although overpaid).
Plotnikov - Sundquist - Wilson
Really excited to see Plotnikov and hopefully Sundquist. I don't know much about them, but if they are half as good as some people say, then this will be one good 4th line.
None of us really know until we see it come together though and injuries will undoubtedly throw a wrench into things. I wouldn't say they deep since there are a number of question marks, but they have guys that can potentially step up.