If it’s only for playback, CD quality is plenty. That’s 16 bits, 44.1 KHz.
I don’t know high the sample rate from the Numark could be (haven’t looked up the specs), but usually, CD quality is the setting out of the box.
You should try out a couple of recordings to assertain the levels. Classical music has a lot of dynamic range.
You need to be high enough in recording level to get the quietest music out of the bottom noise, but not so loud that peaks start clipping. Digital clipping is awful. When a tape recorder clips, it’ll result in 5 to 10% of cubic distortion. That might even sound good to some, especially on rock. But when digital clips, it clips to 100% distortion for the duration of the clipping. And that sounds awful to everyone.
Play a track, set recording level as high as you think you can go. Record, process to mp3 and listen. MP3 wasn’t really developed for classical music, but it works. It just requires a bit more experimenting with the settings. Personally, for classical vinyl recordings, I use 192 Kbit/sec, no joint stereo and no variable bitrate. But even 128 Kbps can sound good if you tune the settings to your taste and equipment.
It just takes a lot of TIME.
And once you have set up the gain in your chain, you can start thinking about removal of ticks and white noise, if needed.
BTW, ipods do play wav and AAC to. Both will be less hassle and better sound if you can spare the disk space.
One thing I need to do before digitizing vinyl, is wash the disc. Some of my vinyl has been played wet, with Lenco Clean fluid and these disks need water…