As tough as it would be to lose Trout, I think that would be the better deal to take. Your pitching seems stronger and deeper than your sticks at this point, and the Trout deal could actually make your offense better overall. Not often I feel good about a deal where you give up the best individual player, but this seems like a case where I'd consider it.
I'd grab Wheeler and/or Yelich regardless.
As of 8/4/13
C:Napoli 1B:Goldshmidt 2B:Kinsler, Gyorko SS:Tulo, Profar 3B:Longoria, Machado, Middlebrooks OF:Harper, J. Upton, AGon, R. Davis, Venable SP:Scherzer, Minor, Ryu, E.Santana, Beachy, Samardzja, J.Johnson (DL), T.Ross RP:Perez, Rodney, Farquar