I don't have much to do with video editing at all, but I have been thinking about having a look.

I would check out the Adobe version as a starting place, I am sure there will be a 30 day trial of a suite from them. Plus you should be used to some of the interface already.

Looking forward to seeing the macro shots matey. I have been reading an article recently about macro which has wet my appetite for it again too. You will have some really great subject matter out there too