I think that most of the long time practitioners would agree, that the best course of action is to have at least one of each.
The lightweight Gis are especially good for those hot days training. While the Heavier tapered Double weave Gis are much preferred for special occasions, such as testing, seminars, etc.
Incidentally the so call "Competition Gis" that the top Judoka wear may seem like an extravagance, but the truth is those tapered sleeves will do more to make you techniques look better than and extra 10 hours of training.
In short uke's fingers don't get caught in your sleeves as much, and that simply makes you look better.
Well just a thought anyway.
-Russ (The Judo Guy)
The JudoGi Store
May your way be gentle.