^ See if your LBS has that bike and ride it... the only way you'll ever know for sure.
Theoretically, I'd say 17" is better than 16" for your height. If you find the cockpit of the 17 slightly too big, you can always use a shorter stem (which is better for DH/FR). If you went for the 16 and found it too small, using a longer stem is generally not a good idea for DH/FR.
I'm 5'10" and I've gone with 18.5" or 19" in the past with about a 40mm stem. The chart says I should be a 17" but I found those a bit cramped (I've got a long-ish torso I guess).
Only you can make the call, bsben...
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