Horns and 2in Drivers

If by 2", you mean the diameter of the diaphragm, I utilize such drivers.  I run a pair of Western Electric 713b drivers feeding a KS 12025 sectoral horn.  This is a great sounding combination.  The Western Electric 555 field coil drivers also have 2" diaphragms and sound good.  Yoshimura Laboratory compression drivers that are attempts at copying Western Drivers also sound very good.

Your profile says that you have a JBL 2426H driver.  Isn’t that a 1” exit driver?  Not that i would insist that any particular design is inherently better than another.  I like the sound of certain compression drivers and all of them are old except some ultra pricey modern drivers by the likes of Goto, Cogent, ALE and G.I.P.  Some vintage drivers I like are made by Western Electric, YL, IPC, Racon, and RCA.  As for the horns themselves, larger horns do seem to deliver more weight, authority and larger scale to the soundstage, but some of the best are incredibly large (like you can almost walk into them and hide).  
i have Western Electric 713b drivers (I am guessing 1” exit, don’t really know) and a somewhat compact KS12025 horn (rated for use down to 500hz).  I know someone using this driver on Western Electric 22A horns, which are pretty large, and that works better than my relatively small horn.