i use vegas, and there are several kinds. if you're doing simple editing and splitting, the cheapest one should work fine - and they have an almost fully functional 30 day trial for each. as far as i could tell, the only thing that doesn't work is you can't work with mpgs but everything else was good enough to convince me to buy.

if you basically only need to split stuff, try the boilsoft splitter - it's cheap, fast and excellent.