Sure,... sorry if I was blabbering, or seeming to take things for granted.
In order to make the best choice in recording equipment, understanding your own recording needs is essential. That isn't necessarily something I have a crystal ball on. I answer questions based on my understanding and reading of the questions. My answers are as straight as possible & based on analysis.
Based on what you stated, (I'll assume, if I may), you want your end result to be in a standard CD audio format, in stereo. However, what goes in behind the production of a stereo recording may be a bit more complex, in a lot of cases, the closer you look. And, so logically, the gear gets more complex as you go up in production value.
The level of technical capability you need in a recording platform to really do it 'right', might be a bit more complex than on first glance. You have to carefully consider what you want to record, and how you want to record it, and/or what final production value you're shooting for.
For basic starters, you don't need much in the way of specialized equipment, if you just want to record 2-tracks onto your 'puter. Buy a mic, a small mixer, and record to your 'puter with recording software, in basic stereo or multi-track, it's your choice. Software does it all, right in the box. With a multi input soundcard, you can record lots of tracks simultaneously. Lots of people do their recording on a 'puter, and swear by it. Desktop computer recording rigs are great for fixed installations, but can lack ease of portability.
Another alternative would be a laptop and a USB audio interface, again, recording on the puter directly, using software. The USB audio interfaces are more limited on the simultaneous number of channels they can handle. However, laptop/portable sound device is a choice that many people take, in home recording. Portability is a big plus.
Then, you get into the standalone portable recording workstations, including the brand new
Tascam DP-01/FX, and all the similar devices in that class. They are many and varied, and in the quick analysis, Tascam seems to have a very nice unit in the DP-01/FX. It's pretty much a leading value, right now in it's class of brand new porta-format HDD 8-trackers. The DP-01/FX' 8-tracks could boost your production value over standard stereo.
However, the DP-01/FX has glaring deficiencies, in that it only records 2-tracks simultaneously, has only 2 inputs, has minimal or non-existant front-end mixing, and has cheesy EQ. However, all the units in the class of the DP-01/FX are roughly the same, and the 2-input/2-simul-max recording limitation is not a problem for some users. It's fine for recording by yourself, but is probably not as good for a choir -type thing.
For someone who may want more control, and a higher production value, plus more versatility in general, the (cassette 4-track) 424mkIII should be checked out, too. That's based on the features of the DP-01 vs. the 424mkIII.
(F/I) With the DP-01, you could record 2-tracks simultaneously, live, and that's it. 2-mics and 2-tracks, and kabam, the live recording's done. With (f/i) the 424mkIII, you could mic the same choir with 6 mics, and send the audio to 4-tracks simultaneously, which would be a more highly produced live recording. The more tracks you have recording simultaneously, and the more inputs you can bring to bear at once, the more highly produced your recording can be,... in a one-shot live recording circumstance.
I'm just trying to put the machines and technologies in perspective, and giving examples. Your question was about the DP-01/FX, an recording a choir. Sorry to get all basic on'ya.
The DP-01/FX is a fine unit in it's class of recorders, probably best-in-value, but it pales a bit as compared to a whole host of other recording technology/platforms. ...
