I'd give you the edge in this deal - a lot of people are high on Watson this year now that Daniel Graham has gone to Denver, but Brady has so many weapons at WR this year, I really don't see Watson's numbers taking a big leap. I think McMichael will do well being reunited with his former offensive coordinator, Scott Linehan, under whom he had pretty good numbers in Miami - I think St Louis will go to their TE a little more this year. This part of the trade is fairly even.
Brown vs Taylor - you come out the winner here - Taylor ain't getting any younger and he's only turned in two complete 16 game seasons in his career - plus there's no reason to believe we won't see a repeat of last season with Maurice Jones-Drew getting a lot of carries and most of the TD's. Brown is clearly the better choice here despite concerns about Miami's offensive line - and with Ricky Williams out of the picture he'll have the ball to himself - and Trent Green will be the answer at QB this season. Brown is clearly the better pick here IMO.
I'd say go ahead and pull the trigger on this one!