Not really enough information because I can't tell how many teams you are competing against. If this is a 10 man team, I figure you are in the middle of the pack (maybe slightly better) at the end of the season. If it is head to head, you never know in the playoffs, but I would not consider you a pre-season favorite to win it.
The worse part, in my opinion, is depth. You have no solid back up at all in Porter or Booker. How many catches did Porter have last year? You really think he is consistent at all? Booker could improve with Welker and McMichael gone if you believe in Miami offense at all. So, "sleeper" pick maybe. Gates makes up for it a little on the starter side. Moss is a top of third tier type WR - he may be servicable as #2 WR, but that is a push. Most outperforming WR are in the second tier and you get a few trickles from the third tier. But he has the capability of being the top of tier 3. Muhmmad, well he is losing out to the new guys (Berrian) and is way down on my list (past tier 3). He is best a #3 option where you have him. If things go well in Miami (and how long have we heard that) Booker could replace Muhmamad. But i have been wrong on Muhammad before.
But injuries will kill you. Yes, your starters are not bad, but you are in a risk situation with injuries.
as the season progresses, look for a rb that is emerging. Barber could end up being a stud in Dallas by end of season and their playoff schedule is fairly good (assuming playoffs are in week 14-16). But they are talking about playing more "power running" game and that means Barber has upside. Taylor, not bad, but he could lose out to the new rookie.
But again, I like your starting WR. And your QB as well. But again, my style of play is to get good RB's and you have one guy who is schedule to get most of the carries - not two in my opinion at this point.
Brees is solid, you might consider trading Leinhart at some time to a team who might need a QB and get a good WR or combo deal for another RB. It would depend on the performance, etc to date of the two sets (wr and rb).
Having Balitmore is solid. their week 14 matchup is a problem facing Indy. You don't want to be bumped out in week 14.