Dirk Nowitzki $20,907,128
Lamar Odom $8,200,000
Final year is only $2.4 million guaranteed but will increase to fully guaranteed if not waived on or before June 29th 2012
Shawn Marion $8,396,364
Contract contains performance bonuses, $546,517 of which currently listed as "likely." Also has a 15% trade kicker.
Brendan Haywood $8,349,000
Final season is completely unguaranteed if waived on or before August 1st 2015. Contract contains performance incentives currently listed as unlikely.
Vince Carter $3,090,000
Both of the last two seasons are only $2 million guaranteed, but both become fully guaranteed if Carter is not waived on or before June 30th 2012. Contract also contains 10% trade kicker.
Rodrigue Beaubois $2,227,333
Dominique Jones $1,276,560
______________________________________________________________
If they are going after both Howard and Deron here's what they should do:
Not waving Odom and leaving $2.4 million on their cap but letting him become fully guaranteed and trading him to the Kings who are under the cap and getting a trade exception and a pick.
Shawn Marion IMO is most likely to be amnestied because he has a 15% trade kicker and shouldn't take up cap space.
Brendan Haywood after looking at his contract is not that awful, he is owed $27 million for the next 3 years, and the final year is non guaranteed making him a cheap center and he is tradable, otherwise you could amnesty him instead of Marion.
Vince Carter will likely be waived as I don't see a team willing to take him on but you never know, so that's a $2 million cap hit if he is waived.
Finally they would have to trade Beaubois and Jones for future draft aspirations just like they did with Brewer and Fernandez.
All of this has to happen if they want both Deron and Dwight, they also don't own their pick which is likely going to the Lakers.
That leaves Nowitzki + $5.5 million in cap holds = $26.407.128 which will give them $31.636.872 to spend on Deron and Dwight, not quite the max you're talking about 15.5 million each that's less then what they could make with their own teams (Nets) or (Magic) but Dallas offers the chance to form a big three so they could take a pay cut just like the Heat players.
So there's a chance they could go to Dallas, in that case props to the Dallas Mavericks.