I thought it was determined quite a while ago that
best available does not include suites?
Also, at the bottom of
this thread, there is a reference to the literature that came with the 2004 cards that explicitly removes suites from consideration. (I didn't actually read the info, just ripped off my card, but I may need to go home and persue it now.)
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4. Room Upgrade: Suites not included; upgraded accommodations at no additional charge.
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