There's really not much on the market today between $199 and $299 (new) with high output.
Yeah, you have a bevy of inexpensive Audio-Technica's, a couple of fine Denon's, some Goldrings, a Shure and a Sumiko or two (perhaps I missed a couple)...but, not much out there these days.
The Grado's change rather remarkably from the Longhorn mod(s)...much more than a simple bar and some internal damping would suggest. I Longhorned a couple other cartridges and I didn't note the betterment the Longhorn had for the Grado's.
I think when you improve the Grado tracking ability, to unlock all the richness that they offer.
If I was in the market for a Longhorned Grado right now - I'd be only too happy to turn my money over to Frank for one. If you don't already know Wayner - he's rather, ummm,
precise with mechanical measures so you're apt to get a superlative job for your hard earned cash.
I've found that with advances in digital technology in the past few years....a Longhorned Grado and a good direct drive machine are the only tandem I've found that is more consistently satisfying that digital playback these days. btw, I'm the Facilitator for the Vinyl Circle - so it pains me
greatly to say that CD/digital is viable high fidelity source now

Good luck on your old/new venture - John