Basketball Insiders is the best from my experience.
DeMarcus Cousins $15,851,950
Rudy Gay $12,403,101
Carl Landry $6,500,000
Jason Thompson $6,431,250
Darren Collison $5,013,559
Ben McLemore $3,156,600
Nik Stauskas $2,869,440
Willie Cauley-Stein $2,831,900
Ray McCallum $947,276
Wayne Ellington Cap Hold (Stretch) $882,630
Eric Moreland $845,059
David Stockton $845,059
Undrafted Rookie FA Cap Hold $525,093
Total Payroll = $59,102,917
Salary Cap = $67,100,000 (or $69,100,000 if the cap rises $2,000,000)
Cap Space = $7,997,083