I'd go w/an all in one box. fudge 24 bit all together and get a Wmod 660 or fr2le.
The FR2LE is (capable of) 24/96kHz, isn't it? Anyway...
I don't record stealth (because I don't have to) but I do understand the considerations of the idiom. When I upgrade, for the sake of simplicity and portability, I'm going to a modified PMD660 (from a considerably more portable, but unforgivably error-prone, MZR700 MD recorder). The hard part, for me, is going to be deciding between Oade and Busman when I buy my machine. Most of the time, I record for documentary purposes (creating an archive of original local/regional music performances). I do
very little in the way of post-recording processing (normalize-to-peak @ -0.2 dB, edit into tracks, <100 millisecond fades on the heads and tails). Since having those extra bits to knock around in post (with EQ, compression, etc.) is the only reasonable excuse for using 24 bit to record stuff that's just going to end up on CD, I don't see a reason (for me) to bother with the "extra" 8 bits (or spend the "extra" money for equipment and storage).
Anyway; my advice, FWIW, is to go with a "one box" preamp/recorder. Best of luck in your decision and recordings!