Hi essyne,
I don't know about that whirring sound in the Roland, so can't really comment on it. When I was doing my research, I wasn't interested in creating CDs, so when I was considering the Roland, I was more interested in its flash card recording option instead.
The evolution of recorders has basically gone from wire recorders to reel-to-reel tape to cassette tape to DAT to mini-disks and CDs to flash cards to DSD (direct stream digital using 1 bit 5.6MHz) in that order. Whereas for my particular purpose I didn't wish to make CDs, I dropped further consideration of the Roland and looked at Marantz for awhile; but once I learned about DSD technology, I left Marantz behind and purchased the Korg MR-1000.
If you happen to have a digital camera at home, the card that you insert for memory is flash card memory. The only difference for a recorder application is that the cards have far more storage capacity by necessity. Like a camera, the recording flash cards go into the recorder, not your PC. Transferring music files from the recorder to the PC is no problem. Most recorders for transfers use a USB 2.0 cable (if that turns out to be the case, get a good one from Belkin with gold connectors to preserve quality), or FireWire. One thing about FireWire though--if you have a Dell PC (like I do), I've read that FireWire and Dell do not get along well. My Korg uses a USB. 20 cable. Most recorders produce files in DIFF (for DSD), WAV or some other formats. If you need to convert one of those into mp3 format, you can download and buy a very cheap software on-line to do that job easily.
Marantz does offer fine products. You're probably looking at their CDR420. I didn't examine that unit, as it's CD-based. I was instead considering the PMD670 flash card unit until I shifted my attention to the newer DSD technology. That CRD310 you have in mind is about $700, which seems reasonable, while the CDR420 is more like $1,200. This choice comes down to a large degree to budget as well as defined needs, decision on technology, and functionalities.
You might look on
www.sweetwater.com. There is an 800# there you can call to speak to their sales engineers, whom I found to be quite helpful in discussing products and narrowing choices down to best match an application.