Looks to me like you would be getting Staal and del zotto and giving up Stepan/Ladd/Carlson/pick.

In this case, I would not take Gaborik or Mueller and del zotto for that package.

Staal and del zotto is much closer:
Staal is the best player in the deal, and is one of the best faceoff men in the league, which gives him a boost in your league. He is also a goal scorer, prominent on the powerplay and an improved Carolina's go to in most situations. Del Zotto is also a contributor across the board.

It's hard to say where Stepan will end up, but he looks promising and could approach the production of Staal, all be it a few years down the road. Carlson is similar to Del Zotto and it is hard to say who will end up being the better contributor. Del Zotto has less competition but on a less offensive minded team if that means anything. Ladd is a solid all round contributor, a good depth play, but more easily replaced.
What might the 1st round pick be?

It's a close trade. I would lean toward taking Staal and Del Zotto as you get the best player in the deal (as of now, might be Stepan 2-3 years down the road) and Ladd can be replaced. I would like this deal better without the 1st invovled. Maybe drop it to a 2nd? Although, your league is quite deep. You might have to take a hit with a FA instead of Ladd, so you might be better off with the depth you have.

__________________
12 Team H2H Yahoo Dynasty League

G, A, +/-, PIM, PPP, GWG, FOW, HITS -- W, GAA, SV%, SO

3C - Backstrom, Stepan, Roy, Krejci, Bozak
3LW - Neal, Hall, Ladd, JVR
3RW - Horton, Callahan, Pominville, St. Louis, Atkinson
4D - Doughty, Phaneuf, Faulk, Campbell, Schultz
2G - Ward, Dubnyk

Farm - Anders Lindback, Mikhail Grigorenko, Joe Colborne, Charlie Coyle, Jakob Silfverberg, Matt Hackett