I recently bought a set of Gibraltar hoops for a project workhorse snare I use all the time. Beautiful hoops - high quality all the way. Got mine from Musician's Friend. Since Gibraltar and Gretsch are now part of the same parent company, new Gretsch drums also use these hoops.
A definite sound difference, for sure. Good luck. Please let us know what brand name you bought, where you bought them and how you like them.