Dynasty Trade Advice

I'm not too comfortable posting this kind of thing on this site since it's not really a fantasy site, but eh, you guys would give the best advice regarding my query, so I hope no one minds.

I'm looking for a more neutral opinion as I'm having trouble making a decision on a deal offered to me. In this league there isn't much of a penalty for keeping players so assume I could keep these guys for as long as I wished. I also should be one of the top teams competing this season, so 2010 contributions are fairly important to me which probably slants the trade a bit towards the first option.

The league uses standard 5x5 categories plus TB, OPS, QS, and HS, so obviously hitters are more important and power is king.

Carlos Gonzalez, Chad Billingsley, Phil Hughes, Jesus Montero

for

Matt Wieters, Neftali Feliz, Pedro Alvarez, Justin Smoak

I have the first side and I'm leaning towards taking it, but I worry that it'll cripple my chances of winnings this season. Do you guys see Smoak and Alvarez contributing this year, and what do you see from Feliz? I really feel like Phil Hughes is set to have a pretty good year as a starter so I hate to move him now when his value is probably low compared to what it may become. Can't deny the talent on the other side, though...

Thanks for the help.