Mavs if they get Kobe. Don't think LAL will trade him to a division rival (Phoenix) and Chicago won't give up Gordon and/or Deng.
Best deals are as follows using salary cap constraints and value-in-return (salary in (); total salaries must be equal or within 10%):
1) Deng (3.32m), Gordon (4.88m), and Wallace (15.5m) for Kobe (19.5m) and Bynum (2.17m)
2) Harris (3.995m) and Nowitzki (16.36) for Bryant (19.5m)
3) Bell (4.75m) Marion (16.44) and Bryant (19.5m)
Bulls don't want to lose both Deng and Gordon but getting Bynum in the deal would be the key.
Cuban loves Kobe but is he willing to give up golden boy Dirk? Harris is also very well liked by the club.
Perhaps Orlando would part with Bogans (2.44m), Arroyo (4m), and Lewis (14.88m) for Bryant but
do the Lakers get good value in return?
Salary source -
http://www.storytellerscontracts.info/resources/07-08salaries.htm