It's no wonder Drew recs the 4-zip--it's eye-catching-swagalicious--and one of his best offerings.
We're just lucky that he allows a 2-zip option.
Personally, I like the 2-zip b/c it has a "cleaner" look with less hardware. For example, I think Aeglus' picture would also look great w/o the 2 top zips, but it also looks great now. Realistically, can't really go wrong, imo.