I find SWN useful for the GM-facing tools...but frankly, even CT feels much better than its combat system, not to mention MgT/CE or T5. (The out of combat skill rules are basically the same, anyway, or close enough that it doesn't really matter).Two new Stars Without Number RPG bundles are up. The first bundle is entirely first edition material and can be found here. The second one is a mixture of first edition and Revised edition material and can be found here.
Stars Without Number is one of the finest science-fiction RPGs available, IMO. Think Traveller but using an old school Dungeons & Dragons chassis, without the Traveller edition warring. First edition material is very largely compatible with the Revised edition (with the exception of the Skyward Steel book), so if you want to go whole hog into Stars Without Number Revised Edition, I strongly recommend picking up both bundles.