Hes a good prospect, in the top 40 range of prospects, but Salty is in the top 10-15 range so Bowden wouldnt be enough. Plus Salty is practically the only good catching prospect out there right now.
Sorry guys but Salty at the moment is a pipedream. Atlanta won't be interested in dealing him mid-season for another prospect when a) Salty is hitting very well in the majors right now and still has Andrew Jones under contract. Even though it may make sense there's zero substantial evidence to suggest the Red Sox are currently making a run at him either. Potentially in the offseason (gaurenteed we won't be the only ones) but these deals just aren't made midseason.
I highly doubt the Red Sox trade Ellsbury, I'll be the first to admit I was wrong but I have a very hard time seeing the Red Sox trading Ellsbury given the potential need in CF.