This isn't a question someone can accurately answer for you .
There are too many factors to consider to give you a definitive answer .
The best advice I could give is for you to experiment a little ,
The best answer to this question is a preference that you must define .
If the 'standalone' player where the discs will be ultimately viewed
supports Rewritable Discs ...this will be an easy thing for you .
If not , You'll need to sacrifice a few DVDRs , possibly , in the name of science .
( It's a good cause : You can waste 'em now , or you can waste 'em later . )
Burn a few different Movies , trying different settings for each ,
Note the 'compression ratio" used in each case .
ie: "Movie Only" , "Movie w/ menus only" and "Movie , w/ menus and extras"
View each disc to determine which looks the best to you ,
on your main player -- this will dictate your preference .
Now you can establish a 'standard operating procedure"
and use this a a 'general rule' to back-up your movies .
I, myself ,
Have no problems with compressions as high as 40%-48%
I usually include "menus"+"extras"+"subtitles" as my 'standard operating procedure"
On my 36" FlatTubeTV , using a PS2 as my "main player" ( PS2 can be very picky )
I find it hard to distinguish the back-up
from the original , and all of my full back-ups @ max compression .
"King Kong" was the only title so far where I could notice a little effect of 'over-compression'
- so I used a DL .
One movie out of 2000+
Your results may vary .
Your Best results are dependant on several factors :
Great Media ( TYs/Verbatim) ;
Your Burner ; Your Burners Firmware match to the media used ;
The Speed used to Write ( burn speed - don't burn too fast )
Your Computer : Mainly the State of Defrag , and good working order ;
Your DVD Player Ultimately Viewed on ( and it's acceptance of the media used and the speed used to write )
The Screen Ultimately Viewed
HD Up-Scaling ( may greatly exaggerated any flaws )
Your Eyes ; Your Standard of Perfection and Your Distance from the Screen
Time to put on a "Lab Coat" and grab a "Clipboard" ..... :bigsmile:
Hope this Helps !