Greetings All:
I just joined the forum, so I thought I would throw my hat into the ring.
My teacher in college, (a long time ago) said always get urtext, Henle if you can find it, for the reasons already mentioned. Henle states on their website that they go the distance in finding the most accurate version of a piece that they can, which, if true, justifies the higher cost. Plus, they will suggest fingering in the tricky parts.
But here's the thing I noticed. The last time I was in the music store I held up side by side Henle and a more popular, less expensive edition (Schirmer I believe) and the difference visually was amazing!
The Henle was on nice paper, not overly white, which reduces glare, and the each note, stem, etc. was nicely printed, dark, well defined. In other words, professional looking.
The other edition was on bright, cheap looking paper, and it literally looked like something that had been photocopied about three times. There were places on practically every page where the ink was faded and/or blurry.
I noticed the same thing one day when my teacher and I were comparing our Well Tempered Clavier editions. (Mine was Henle, hers I don't remember).
Sure, the better versions are more expensive but you're paying for readibility, durability and scholarship.
Anyway, nice to meet everyone. This looks like a great forum with a lot of knowlegeable and helpful people with a lot of interesting ideas.
Earl