I'm in a 12 team dynasty league (we keep 28 players - 20 MLB and 8 MiLB with no limits or $ values). Tonight is our trade deadline. I'm out of contention but I'm trying to improve my team

I've received an offer where I trade J.Upton/CJWilson/A.Soriano for Tulo/Beachy/Youkilis

Upton is my best player (my other RF are Markakis/W.Myers). Despite J-Up's down year I still believe he's an MVP talent. Tulo would replace Hardy at SS and solidifies the position but I feel the trade would create a hole in RF.

I wouldn't keep Soriano and Wilson is arguably a top-30 starter. Beachy is out after TJ but maybe he holds more upside than CJ. Not crazy about Youk but need a 3B (I have ARod).

Am I selling low here? Is it a good trade?
Would you do it? I'm wondering if it's a "1 step forward, 2 steps back" kind of deal

Hold or make the deal?

Deadline is at midnight ET....any help would be appreciated. Thanks!