HI jrex,
Are you pluging your bass direct into a direct box? If so you may want to get a Preamp with eq or a Preamp/DI like the sansamp, it has three band eq and a "ampsimulator" circut. Nice unit for $179.99. Avalon U5 is Awsome if you have the dough. The preamp I ust to use was a Fender TBP-1. Great Unit. Check out
www.basstasters.com to get a feel for some DI's and or preamps. As far as monitoring goes, it really depends on how your system is set up, How many AUX's or monitor sends you have and quality of the components in the system. If the sound guys are sending you your own monitor mix through the wedge, it is more than likley on a separate aux. Instead of using the Wedge you could use either a hardwired or wireless in-ear-monitor system and they could create the mix for you in your ears. I use in ears at church and they are a life savor! Look for either Shure PSM 400-700 series units and either Shure e5 ear monitors or Westone UM2's. There are others on the market but these are dual driver units (biamped hi and low driver) that sound really nice. Your still at the mercy of the sound guys doing your mix, but if they have a good ear and have the ability to "shadow your mix" and listen in they should be fine. Aviom makes a system to where each member of the group has a unit at their fingertips and they can control up to 16 channels of their own mix and have the ability to do some stero panning as well. Sorry for the long response but hope it helps.