What determines the speed of the copying process is the hardware in your computer: CPU, RAM, HDD or SSD, and of course your DVD drive or Blu-ray drive read speed.
It's hard to say if buying a faster Blu-ray drive will make the copying process faster, as the process might be handicapped by your CPU or maybe even by your RAM. You would have to take a look at the speed of your hardware and calculate where the bottleneck might be. It can never hurt to have a faster read speed on your Blu-ray drive though :)
When I make a backup copy of a DVD with MakeMKV it takes my computer about 10 minutes. I have not backed up a Blu-ray yet though.
Hope this information helps.
P.S. I think backing-up movies to MKVs is the best option.
message edited by Incarnadine_