Hi. And welcome!
I use Vegas and although I run miles from weddings (and I think you are brave tackling Asian weddings... there's so much going on!) I regularly edit lengthy stage productions with it. Vegas is un-endingly stable, provides all the tools and more you'll almost ever need and is in my opinion the dogs soft bits. Rendering can take time if there's alot of effects in the chain, but I just leave it overnight to do it's stuff.
Download a trial and see how you get on....
Sony Creative Software - Download: Trials and Demos