To DVDFab or not to DVDFab

I purchased a lifetime subscription of DVDFab products some time ago. Back when I was younger and more naive.
I don't want to start a flame war, just looking for some impartial opinions and direction.

There seems to be a lot of negativity going around about DVDFab's encode quality.

Indeed, they waste 4% of every blu-ray. Now I don't know if that's because they can't figure out what bit rate would give optimal disk usage, or they have the VSO mentality of "filling disks is a bad thing". There are a few other niggling things with DVDFab and the UI (IMHO), is terrible.

My typical use scenario is -

• Backup 3D Blu-rays to ISO - Full Disk.
• If I'm going to store on my server I will do blu-ray RIP with audio and video copy to try to maintain original quality.
• When I run short of space on the server I often burn back the MKV file to BD25.
• Sometimes after purchasing my original disk I will immediately burn to BD25
• All originals are then stored offsite for safe keeping. To keep originals in mint condition they are never played.

So given that sort of usage scenario, if DVDFab is producing poor quality encodes, what software would give me the best quality?

**Yes, I know disk is cheap. I've already got 9 x 6TB drives. Mobo can't handle more, and I can''t justify the cost of upgrading drives to 8TB.