Best quality there is with given bitrate?

[macgyver2004]

I need to compress some video files with max file size of 2GB.
Time of encoding isn't important.

I have two lines:
start /wait /low HandBrakeCLI -v -i "%%~na" -o "%%~na_temp.mp4" -f mp4 -m -e x264 --encopts keyint=500:rc-lookahead=250:pass=1:stats=stats.log:partitions=p4x4:me=tesa:no-fast-pskip --x264-preset veryslow --x264-tune film --vb 2000 --two-pass -a 1 -E faac -B 192 --mixdown stereo -R 44 -X 1280 -Y 720 --denoise weak -s 1 --subtitle-burn 1
start /wait /low HandBrakeCLI -v -i "%%~na" -o "%%~na.mp4" -f mp4 -m -e x264 --encopts keyint=500:rc-lookahead=250:pass=2:stats=stats.log:partitions=p4x4:me=tesa:no-fast-pskip --x264-preset veryslow --x264-tune film --vb 2000 --two-pass -a 1 -E faac -B 192 --mixdown stereo -R 44 -X 1280 -Y 720 --denoise weak -s 1 --subtitle-burn 1
i haven't tried them yet.

The films are about 2 hours so bitrate i need is about 2000.
Is there a way to make better compresion and quality?

[Smithcraft]

You're hampering quality by limiting the file size/bit rate.

SC