Best Burner software - for Multisession/Data

Hi Folks,
I have searched the forums and looked at many burning s/w recommendation threads…but my requirement is more specific

I mostly write .rar files and video file in multisession format…lately i am having problems with Nero :doh:

Is there any other software which will provide me with better quality & reliable burns…and in ISO and UDF formats ( i mostly burn in UDF formats)

I am least concerned on the resources it takes/ commercial or free/ writing speed.

For me - burn quality, reliability and compatibility is most important…

Thanks for all your replies
Cheers