hey Ronn, out of the players you have mentioned, these are the 8 I would suggest you keep.
Brees - Its a no brainer. He is a top 5 Fantasy QB and football is becoming more of a passing game than before.
Boldin - This is a risk or reward keeper. Who else is flacco gonna throw to? with that said the opposing defenses can double team this guy often.
Landry - A tackling Machine. enough said.
Cole - With even better secondary and babin joining him on the other side, he is lined up for a great season in sacks.
Harvin - According to me he is the only legitimate deep threat in their team. I dont even consider berrian a threat in taking away from Harvin.
Mendenhall - for lack of a better RB on your team. Bush is an attractive option, but with daniel thomas the likely starter come day one, bush should be only third RB in most leagues.
Kelsay - good DL's are tough to find
Dansby - I wouldnt mind either this guy or Laurinitis coz both are good against the run. Dansby is a bit better in passing situations.
Good Luck this year.