I agree with the above posts that says "Once you go...electronic, you never go back," especially as an instructor, or someone who takes new shooters to the range. I have a bunch of Peltor Sport RangeGuard (RG-OTH-4) muffs I loan out to students or new shooters. There's no substitute for hearing and being heard when on the range.
I've always considered the gold standard for over-the-ear electronic muffs to be MSA Sordin Supreme Pro X's with gel earcups. I have a set, and they're amazing, especially if you're used to cheaper electronic muffs that "clip" high db sounds. Db clipping can be effective, but makes conversation problematic, and can be easily overloaded. (I was trying to talk to a buddy at a 3-gun match once, and because of all the background firing going on, the muffs kept cutting out, and he couldn't understand what I was saying. In frustration, I yanked the headphones off my head and jammed them on him, and finished the sentence I was trying to get out.) The Sordins dynamically compress the sounds, so you don't really even notice that "loud" sounds are "loud." But they're pricey, no two ways around that.
I recently picked up a pair of Peltor Sport Tactical 500's as a backup, or to use as a loaner, and added a pair of Peltor HY80 Gel Earcups. They snap right in, and really improve both comfort and seal. The Peltor's use dynamic sound compression, just like the MSA Sordin's, which is really unusual in a $110 headset. For about $150 ($40 for the gel earcups), you've got a headset that's DARN close to the MSA Sordin's in comfort and effectiveness, with the added plus of Bluetooth. It's hard to go wrong with these.