I think it's a deep roster, and would honestly feel pretty comfortable going into games with Austin, Stevie Johnson, and Antonio Brown as my 3 wideouts.
However, if you want to upgrade, I'd suggest waiting until Crabtree has a good game (did he have one this week? I don't know), then packaging him and Brown for a guy like Victor Cruz.
Or, failing that, maybe a WR and Pettigrew for a guy on Cruz's level, and then raiding the waiver wire for a TE backup come bye week.
Help with mine? viewtopic.php?t=520621