Mac Forums

i luv my apple mac to pieces!!! and i wouldnt change it for the world but i have one slight problem..
IMOVIE!

not matter how much i love imovie as its soo easy to use compared to the windows movie maker rubbish i have an issue with it. As i improve my video making skills i want to use more effects and i want to turn video clips arounds. even the simplest effects on sony vegas i cant do.

can i download imovie HD for free? and does it have more effects?
can i get any extra downloads to add to my imovie which will have more effects?
can i get sony vegas on a mac?
Or is there a better video maker out there for macs? that is quite cheap to buy????

ANY help would be amazing thank you!!