Welcome To MyCe
Not sure there is a best, it's all in what you want.
That said I will agree with Whappo and getit29 on DVDFab ( bought version ) it is an easy all in one piece of software that works great.
pixeling and freezes
getit29 is correct in that usually means the disc or how fast you are burning.
Browse around and you will find a wealth of information on both problems.