QUOTE(oldromola @ Nov 1 2009, 09:52 PM)

I have Novello from about.......err 50 odd years ago!
Ah, but
which Novello edition?

I think there may be some quite old ones knocking about out there. If your copy of the "Eight Short" is the one edited by John Dykes Bower and Walter Emery in 1952, then it is perfectly sound - Emery was a good Bach scholar. Really the only thing to dislike about it is the dynamic, registration and metronome suggestions, which are not clearly marked as editorial and thus exude a specious authority which students find difficult to disregard. Other than that, it is an urtext edition, so is mercifully free from phrasing and fingering, though there are one or two pedalling suggestions. Page turns are good (there are a couple that need a bit of practice).
The Bärenreiter Edition is more expensive (£10 from Allegro Music against £7.95 for the Novello). The editor (Alfred Dürr) is no less front rank than Emery. The notation is larger, clearer and quite beautifully clean - the urtext is rigorous. There are one or two fairly insignificant differences in the notes (e.g. due to different interpretation of accidentals), but they are of no moment. The page turns are even better than Novello: most movements fill a single opening. This is the edition I use simply because it is such a joy to play from (and because of the sensible ascription: "Formerly attributed to J. S. Bach"!)
The major practical difference between the editions is that Novello divides the music between the hands where necessary whereas Bärenreiter does not. For example, in the C major fugue, the second entry (the answer) is printed on the left-hand staff in Novello, but on the right-hand one in Bärenreiter. For the less experienced student, this is likely to make Novello the clear winner.
I am afraid I have not seen other editions of the Eight, so cannot comment on those.
Bach's autograph copy of the Orgelbüchlein survives, so there
should be no differences in the readings between the different editions. The nice thing about the Novello edition is the inclusion of the harmonised chorales with translations of, usually, a couple of verses. A student of Bach's wrote that Bach had taught him always to play chorales according to the
affekt of the words, so this is very helpful. Again it is a perfectly serviceable near-urtext. Bärenreiter is again very clean and well laid out (and also lists the titles that Bach never got around to composing), but for an amateur student, probably not worth the extra expense. Page turns are not always easy. The Breitkopf edition (Beckmann) is also reliable, but the page size is smaller and the printing therefore more cramped.