A few months ago I had the same decision point (transport v dac). After a lot of research and listening to different transports, I decided to go with a an Onkyo CD changer for approx. $140 (gf likes changers) as a transport only with a digital out going into a separate DAC (at that time a Jolida tube DAC).
I listened to Cambridge and an Oppo units (used as transports) and compared it with the Onkyo and could hear no difference into the same external DAC, so I decided spending money on a (more) expensive transport was not worth it to my ears.
I'm no expert, but I have read that the only real issue to be concerned about with a CD transport is jitter. Using this thinking, most newer DACs reclock in the DAC itself, so jitter from a transport would be (generally) immaterial if using a newer DAC. If using an older DAC, you could consider a reclocker.
In any event, I couldn't hear a difference in transports. YMMV, IMHO, etc.