Ignore everybody else on this thread. You can even ignore me. Read what Aesopian wrote about what is the best.
Then, and only then, check GiReviews.Net
to see what other people are saying about it and read a few reviews.
Nogi Grappling SPATS/Tights - http://www.okkimonos.com/category/spats-tights
Everything you've ever wanted to know about BJJ Gis - http://GiReviews.Net/EPIC