I simply use "Astrobyte" free software to generate a list of globulars in list of magnitude order and then hit "print screen" button on the computer. There are 100 globulars brighter than magnitude 11.0. It also has the standard description notes, size, etc... I also have a hard copy of NGC 2000 if I want to double check anything. Only one GC in the top 100 has no NGC or IC number - Pal 9 in SGR.
But getting back to the original topic... if you use the above method to generate a list of the top 20 or 30 GC - you should have some nice targets. Comparing to what you observed, M4 comes in at number 8. M80 is about 25 or so.