I don't know anything about the Yamaha units, but of course the Alesis Masterlink is nice.
The Pioneer based units are my favs though. I have
the Fostex CR300. IMO, the sound quality is as good as CDR can get and it’s been very reliable. I would get another if the one I have broke down, or an
HHB CDR850, which is exactly the same as the Fostex, except for the color… both made by Pioneer. I used to have the Pioneer PDR-555RW as well. Sounded great and did a good job for a consumer unit.
The only caution is that HHB
CDR850 owners tend to love these units to death. You may come across units on eBay and such that are just plain worn out and have some type of issue. Both the Fostex and HHB are professional units, so get a lot of use in busy commercial environments. There are a couple known issues but they can be easily fixed by the end user if they crop up.
The stand-alone units write in real time 1X, of course. Most HD units write to the disc at much faster speeds, but it depends on how you work whether that will be an advantage or not. I do little to no editing in the digital realm for most serious work. I master to half-track open-reel, transfer to CDR and make what copies I need of the CD master at higher speed on my PC using a Sony burner. There are many ways to skin that cat (no offence to cats… they’re cool).