DV Info Net - 30p 24p 60? Test from 60D

I shot 4 very short clips at different settings to try and determine what is going to work best for my upcoming wedding season.

Questions: I can't find in the operator's manual, but the 1280x720 60 setting in the Canon 60D seems to be 60 progressive. I took a frame and put it in Photoshop and it appears to be progressive. But when I render in Vegas, there isn't a 60P setting - at least in "main concept AVC/AAC mp4. So, I rendered as 29.970 progressive and it came out fine. Is there a way to shoot 60i in this camera?

Does anyone have an opinion as to which setting produces the nicest camera movement?

Is there a best setting if output to SD DVD's is most probable outcome?

Is there a setting that would allow me to do decent slow-motion (in After Effects/Twixor) every once in a while?

Test 01 (1080 30P)
Camera setting
1920 x 1080 30
1/60th shutter speed
Vegas project setting
HD 1080-30p
Render setting
MainConcept AVC/AAC mp4
Video 29.970fps, 1920x1080 Progressive 20 Mbps
Uploaded to YouTube
YouTube - 30P test

Test 02 (1080 24P)
Camera setting
1920 x 1080 24
1/60th shutter speed
Vegas project setting
HD 1080-24p
Render setting
MainConcept AVC/AAC mp4
Video 23.976fps, 1920x1080 Progressive 20 Mbps
Uploaded to YouTube
YouTube - 24P 1/60

Test 03 (same as Test 02 except for shutter speed)
Camera setting
1920 x 1080 24
1/50th shutter speed
Vegas project setting
HD 1080-24p
Render setting
MainConcept AVC/AAC mp4
Video 23.976fps, 1920x1080 Progressive 20 Mbps
Uploaded to YouTube
YouTube - 24p test 50th.mp4

Test 04 (720 60P)
Camera setting
1280 x 720 60
1/60th shutter speed
Vegas project setting
HD 720-60P
Render setting
MainConcept AVC/AAC mp4
Video 23.976fps, 1920x1080 Progressive 20 Mbps
Uploaded to YouTube
YouTube - 60p