Huge Longoria Trade. Need Advice.?

Heres the trade.

I would Get-Evan Longoria,Dice-k, and Jonathan Broxton

He Would Get-Joe Mauer,Justin Morneau, and Dan Haren

Heres the rest of my lineup to see what i would be losing

C-Ramon Hernandez

1B-Justin Morneau

2B-Ian Kinsler

3B-Kevin Kouzmanoff

SS-Hanley Ramirez

OF-Rick Ankiel

OF-Carl Crawford

OF-Matt Kemp

U-Hideki Matsui

Bench-Jed Lowrie,Jim Thome,Joe Mauer-Mauer is injured

P-Ryan Dempster

P-Gavin Floyd

P-Matt Garza

P-Dan Haren

P-Scott Kazmir

RP-Brian Fuentes

RP-Brad Lidge

Bench-Jon Lester, David Price

Now I think this could be a decent trade if i take it right now.

Mauer has a back problem and thats never good for a catcher, he could be getting surgery, I think Dice-k and Haren and even.

I would have to keep a low points catcher but he could end up getting nothing in return if he goes on the DL. I would have to get a 1B through either FA or Make a trade for a mediocre guy like pena,Cantu, etc.

I really need help here, my main goal is longo and i think he could be mvp this year. Giving best answer.Thanks