I tried the default setting for Dense Paradise (after unpacking and installing) and it seemed like a nice size. I don't knwo what the Max Planet setting was, though...it just looked "roomy" enough.
I'm not sure where geo got his figures and approximations, but only 60 inhabitable systems for 6 people seems a bit low. In the Tourney (rd5) game, I have colonies in over 20 systems and only share systems in 2 locations. That seems a bit roomier
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So, again, it's not that big of a point to me (but knowing ahead DOES affect empire choices). So, please let me know what parameter limit you will be using so I can generate a few test maps on Dense Paradise and see what we're "talking" about.