the 7D shoots at 1080p24p and 1080p30p, and at 720p60p. that makes for a whopping total of 3 pretty standard frame rates that you can find in a ton of HD camcorders. of course it also does SD at 60p but i'm ignoring that. the HVX shoots at 720p24pn,720p30pn,720p240p,720p30p,720p60p,1080i60i,1080i24p, and 1080i30p. plus, if you're shooting at a PN resolution, you can also overcrank or undercrank using frame rates of 12, 18, 20, 22, 24, 26, 30, 32, 36, 48, or 60 fps.
and as for the mic thing, yea you're right that people should use a mic to record. but if you're doing guerrilla work or you just flat out don't have the money to buy a nice mic, the one on the hvx is considerably better than the onboard mic of the DSLRs.
but none of this is really here nor there because if you read my previous posts i told the OP to buy a DSLR if they are able to. I have one myself and use it all the time. haven't touched the HVX in months.