Considering using a portable disc player as source - any recommendations?
I'd recommend against it.
1) More opportunities to scratch up your CDs
2) You can only bring so many CDs with you
3) Spare parts and maintenance: can you replace the laser head? can you replace the spindle motor? even if you get it cheap now think of the long run (main reason why I'm no longer using any kind of disc-spinning source, unless it's a HDD)
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And then when you think about it, you can have something like this:
1) I archive any discs I buy after ripping*
*which, thanks to my tastes and exorbitant customs fees, half of which are only in digital copy; the rest I stock up in my brother's apartment in California and shipped whenever they send out anything through any means where Customs won't rape my wallet
2) There are roughly 70 albums (and 75CDs, since some are double disc albums) in the 32gb card, all in CD quality FLAC.
3) IF anything breaks in this thing, there are tons of shops everywhere that can look at it, vs how many shops that still service disc players; not to mention that the last CDP (not a Discman/portable) I had that had its transport give up the ghost would cost $200 just for a replacement CDM-4 transport (plus shipping cost, plus Customs fees, etc); the carrier subsidized the phone (and I've had an option to upgrade, but I'm holding off); etc