Since the neither of them has XLR inputs you are limiting your choice of mics.
I would say both a poor choices for movie production.

You should check the Zoom H4n. I have never used it but I have spoken to
people who swear by it.

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The aim of an argument or discussion should not be victory, but progress.
Joseph Joubert, essayist (1754-1824)

Thanks, I'll check that one out!

What about running adapters from XLR to 3/4 or smaller audio cable? Does that really kill the quality, or does it not make much difference? In my current situation I'm severely limited on mic choices simply due to my budget (next to nothing) and I've been doing everything 'guerilla' style for the most part.

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Yes, using an adapter hurts the quality.

But if you can't afford the H4n and a good mic, then you use
what you can afford and make the best of it.

Wow... that H4n looks amazing! SD chip recording, XLR input, USB port for faster transfer, everything about it looks awesome, even the onboard effects for recording instruments/music! I checked on ebay and it might be possible to snag one of those used for as low as $200! I'm keeping my eyes on the auctions, thanks for the advice!

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With respect to your suggestions, while there may be little difference in quality as a consequence of using a XLR to 1/8" connector, there's a bit more to that. First, the 1/8" stereo plug is NOT balanced, which means that any power line (or power cord) that comes near your microphone cable might introduce buzzing. Same with RF interference. Second, the analogue circuitry built into a device with a 1/8" is never going to be of a comparable quality to that with a XLR connectors. While both of your suggestions offer 24bit 96kHz sampling, it doesn't help much if the analogue sound being sampled is polluted with circuitry noise.

The H4n is quite famous among independent filmmakers as a quality, reliable field-recording audio device. If you are able to afford the Roland Edirol device, you'll be able to afford the Zoom, as they both cost approximately the same (Tascam is cheaper, though, and is not in the same class).

The Zoom H4n seems to get a lot of love round the place, haven't tried it myself but have heard mostly good reports about it. Also add the Marantz PMD661 into the possible options for recording devices. I hav eone and really like it. The small handheld recorders with mini jacks from Tascam I have heard actually sound quite good too, but personally I suggest one with XLR's is far better for reiability of connection than mini jack equipped ones.

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