Recommend service to convert music CDs to high quality digital files

For just ripping 50-100 cd’s why not just do it yourself? Playback is a whole other ballgame. To get better feedback it would help if you gave a budget, and how you’d like to play back the files. There’s way too many variables.

Thanks for the guidance. I would only have the CD's ripped if the resulting files were a noticeable improvement in the audio quality.  The cost of the component to do this myself vs using a service would determine how I proceed. I would consider spending up to $500 for either not including the playback component. 

If you own a computer with a cd drive then you already have everything that’s needed to rip.

I use EAC. It's free software that will rip to most any digital format you want. Google it for more info.

If you have a PC equipped with a CD drive with which to burn CDs, I suggest giving dBpoweramp a try.  They have a 3 week free trial period.  If you like it it's only $39.  If you have a windows PC which doesn't have a CD writer, an external CD writer can be had for $30 or so.  I've been using dBpoweramp for years.  Rip all my CDs as uncompressed Flacs.