Even as a relative newcomer to video (several months), I've used a few different programs. Some are quite difficult to learn. But I'm completely sold on Cyberlink Power Director 10. It's relatively easy to learn, there's and excellent user support forum, and there are excellent video tutorials on how to do almost anything you could want to do.
PD 10 is very stable and it's lightning fast at rendering video. There are good default rendering templates in the program - but you can easily create your own rendering template if you like. Also, PD is flexible and powerful. You can change white balance, color balance (separately), brightness, contrast, backlighting, sharpness, and a half dozen other things if you like. There are more "special effects" possble than anyone would ever want - but some of them, like cropping, zooming, picture-in-picture, subtitles, chapters and subchapters - are useful with most videos you'll make.
PD is significantly less costly than Vega, and from what I've read it's much easier to learn and to use.
There's a free trial version, fully functional for 1 month.
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Bill Hansen
Ithaca NY, USA