Hi Coop,
I just bought a 1991 EG-4 last week, pretty beat up but it is an awesome guitar!!! This is my first PRS and I am blown away by it (I don't think it will be my last PRS). The HFS humbucker (to my ears) sounds amazing (it has more balls than both my SG & Les Paul's 498 & Burstbuckers, but without being obnoxious), but I do not like the two single coil pick-ups as they sound weak & weedy (possibly the worst single coils I've experienced in 30+ years of guitar playing). The non-locking PRS/Schaller tuners hold the guitar perfectly in tune, even with my wildest dive bomb attempts on the trem - very impressed with that. The neck is sublime and plays great. I heard rumours that the neck joints can be a bit iffy, but mine is solid. I absolutely love it. If an Eg-4 is this good, I cannot wait to get a Custom.