I have used separate recorders in the past for projects I worked on at University and I'd agree for getting the best possible quality it's definitely the best way to go but I feel that it would be overcomplicating the process for me in this case, plus I really thing it would be massive overkill to hook a VideoMicro to an ADC, if I were to buy an ADC I'd certainly get a higher end microphone as well.
For right now I'm just interested in getting decent quality for sharing on Facebook or Youtube and I don't really want to be lugging a lot of inconvenient equipment around when I'm just out with my friends.
Out of interest though, what sorts of microphones have you used in the past Thad?
I have also had a chance to test the microphone a bit more at a local car show and I've got to say I am very disappointed with how it handles louder sounds, past a certain threshold the in-built microphone actually does a better job at recording loud engines. The Rode just cuts out with pops and crackles, basically making the recordings useless.