Going by previous LTD GTA IV sold around 150k combined this month. Split through June was 65/35, applying that to this months sales would put 360 version at ~97.5k, and PS3 version at ~52.5k. Which would put a bottom limit for #20 at ~100k. Going by SSBB previous LTD with last month's educated estimated sales would put SSBB July sales at ~120k. So, here's my estimated Top 20 sales.
Estimated Top 20:
01 NE [360] NCAA FOOTBALL 09: 397,600 (NEW)
02 04 [WII] WII FIT: 369,600 (1.43m)
03 02 [NDS] GUITAR HERO: ON TOUR: 309,700 (732k)
04 05 [WII] WII PLAY WITH REMOTE: 284,000 (6.40m)
05 NE [PS3] NCAA FOOTBALL 09: 242,500 (NEW)
06 NE [360] SOUL CALIBUR IV: 218,900 (NEW)
07 07 [WII] MARIO KART: 174,500 (2.41m)
08 12 [WII] ROCK BAND: 165,800 (Est. ~0.4m)
09 NE [PS3] SOUL CALIBUR IV: 155,800 (NEW)
10 NE [360] CIVILIZATION: REVOLUTION: 147,600 (NEW)
11 NE [PS2] NCAA FOOTBALL 09: ~140,000 (NEW)
12 06 [360] BATTLEFIELD: BAD COMPANY Estimated ~136k
13 16 [PS2] GUITAR HERO: AEROSMITH Estimated ~132k
14 18 [NDS] NEW SUPER MARIO BROS Estimated ~128k
15 NE [NDS] FINAL FANTASY IV Estimated ~124k
16 13 [WII] SUPER SMASH BROS: BRAWL Estimated ~120k
17 RE [NDS] MARIO KART Estimated ~115k
18 NE [360] UNREAL TOURNAMENT 3 Estimated ~110k
19 14 [WII] GUITAR HERO: AEROSMITH Estimated ~105k
20 01 [PS3] METAL GEAR SOLID 4 Estimated ~100k