I've some experience of recording audio on separate devices then sync'ing in post, usually for video. Results vary between devices when it comes to synchronisation.
One thing I will advise, and this is through bitter experience, is NEVER EVER record direct to mp3 format! The synchronisation drifts like crazy...
I mention it because I use a couple of Tascam recorders which have an option of recording to mp3, which may be appealing due to the smaller file size / more capacity on storage. Get a bigger SD card..
I'm not even going to mention audio quality of mp3, because for some applications it is perfectly acceptable, but I'll get flamed for suggesting that! ππ