Oh my.....
Here is a must read about this kind of thing....
https://homerecording.com/bbs/showthread.php?threadid=10426
I think you are throwing good money at a dated idea buying ANY of those things. A year from now, you WILL be disappointed that you didn't spend a little extra money and get the added versatility and variety of going the computer route. Too many before you have found this out the hard way.
You could buy a used computer for around $300,
a Lynx One soundcard (www.lynxstudio.com) for just over $400, and find some, ummmmmmmmmm, "shareware" mastering software on the net, and, ummmmmmmmm, "shareware" versions of all the hottest plugin's, and spend another $200 for an internal CDR burner in that computer and do much better then any of the options you are considering right now.
You are looking at a $900 investment (without software) for a mixdown setup that offers 24 bit recording, the choice of just about any A/D/A converters you would want to use down the road (the Lynx converters are very very good, but it's AES/EBU digital I/O means you can use different converters later if you wanted to), and use a whole slew of great working and sounding plug in's to apply mastering eq and compression to your mixes.
Yes, your learning curve and hassle to get it all working just right is going to be a little higher, but what you gain in versatility and quality is totally worth the effort. This setup just allows you to do so many more things. If you wanted to send your product out to a mastering house, you can mix right to the computer and burn 24 bit data cd's to send to them. If you want to burn a disk right on the spot to hear it, you can do so at up to around 8X speed. If you want to do some creative editing of your music, you can. Read that link I supplied carefully, and see where the computer route offers much much more then even the Masterlink, and at a cost that is comparable. Certainly, it is far more versatile then the stand alone CD burners.
I paid $1300 for my Marantz two years ago! You know what I use it for now? As a way to digitally transfer music on CD's to my hard drive. That is it. It is totally worthless to me now except for that since I started mixing to the computer.
The sound quality upgrade from when I started using the Lynx One card was astounding to say the least! Compared to the converters in a stand alone DAT or CD recorder, it just blows them away. I would never go back to mixing straight to DAT or CD recorders, or ANY 16 bit format at all!!!
If you do choose to continue down this route of a stand alone unit, try to get one that offers the most options in In's and Out's (you want something with digital I/O possibly, and of course you want +4 analog I/O for that "pro" level of recording). After that, I doubt that you are going to see a whole lot of difference between them all. The A/D/A converters may sound a bit different between them, but probably not too much different, and you may not be able to tell at all.
My Marantz has been very dependable. No problems whatsoever with it. It is easy to use, and even looks pretty cool....
I just think you are missing out on an opportunity to do so much more with your mixes after the fact by not going the computer route. Hell, if you don't want to hassle with the computer route, at least spend some a few extra bucks and get something like the Masterlink so that you can at least apply a little compression and/or eq to the mixes after the fact if they need them.
Good luck.
Ed