HD Converters

Does anyone know of lossless quality converters that support a wide range of extensions? If it truly is fantastic quality, then having to pay for it won't be an issue.

I would recommend Prism Video Converter, you can input your own encoding data so that you can get HD quality from the formats of your choice. You can always use Sony Vegas to 'convert' the files but I presume you want the files so you can edit them in Sony Vegas?

Chi~

Correct. I'll try that out.
Update: Wow, your suggestion seriously saved my ocd's life, haha. Thanks a bunch! The quality remains the same great quality! :D

my friend has abunch of lossless but lossless files are HUGEEEEEEEEEE

They can be. I think Prism works great for not losing quality and still remaining under a reasonable size instead of walking away from the computer and coming back to a file's conversion being so huge that the computer is losing way too many GBs of space and is flipping out, haha.