I wouldn't play Topete at SF; girt is right - he's much to slow an unatheletic for SF. I'd definitely use a SG. If I had your squad, here's the lineup I'd use:
PG: Dutil, Jordan, McPhail
SG: Helmuth, Barnes, Wright
SF: Wright, Trinh (vs m2m)/Barnes (vs. zone)
PF: Trinh, Topete, Cochran
C: Lough, Stepanski, Cochran
i'd redshirt Belin or Cochran. Belin if possible because you have so many guards.
as an aside, your team right now is more suited for FCP or even zone than M2M. Your defensive ratings are not strong enough. That being said, you should have no problem scoring points, especially from the perimeter. best of luck to you!