Whadya wanna know?
I've ridden all three of those. Didn't like the styling of the cross country. It was a good ride though. The Road Glide was a really good bike, I enjoyed it a lot. But on the hot day I rode it my legs were just baked in traffic, very uncomfortable. I couldn't get used to the idle shake. And I felt the Vaqueros stereo was louder (but that's nothing a few mods can't fix on the Harley).
Find a dealer willing to test ride them and ride them. Or go to demo events. All good bikes. Personally, riding the Vaquero felt a bit more special to me. I liked it more. Again, the heat was an issue for the Harley, it's more expensive, and all of the consumer research reports out there suggest they are less reliable and more likely to require major repairs down the road. A killer deal came along on the Vaq and that kind of sealed the fate!
What I like:
Suspension is phenomenal (also, more travel than the Harley; maybe that's why I felt it was a nicer ride)
Strong brakes, ABS is nice
Stereo is good
Plenty of pep; a little throttle lag, but that's fixable with a mod
The dash and styling just put a smile on my face every time I ride it.
Cruise Control / etc. are great
Not so great:
Both Harley and Victory models had a better stock seat. But, for me, even those would've needed replacing. So it's moot. But the stock seat sucks.
Wish it had better options for iPhone connectivity. Newer Harley's have bluetooth, unsure what options Victory has. But the only option from Kawi is an outdated 30-pin adapter which requires ANOTHER adapter for the iPhone
Accessories are really steep (true of all three brands though). Sissy bar - $700, CB - $700 (+ headsets, etc.) It gets pricey.
Add Indian to your list, those are some cool bikes. Check those out.
If you wanna watch some idiot (me) ramble for 30 minutes about the Vaquero; here's a video:
That was with a couple hundred miles on it. Sort of a lengthy 'first impressions'
If you test ride one with less than 1,000 miles on it, keep in mind that it's a little shaky/vibraty (is that a word?). It's a bit rough. It smooths out a LOT as it breaks in.