Robert Mulholland in the Cornerstone series has a nice balance between exegesis and theological interpretation and is useful both for scholarship and ministry.
Richard Bauckham's Theology of Revelation.
If only one... Beale's NIGTC volume for exegetical rigor, sensitivity to OT backgrounds (a couple other volumes would be nice to supplement for socio-historical backgrounds, though).
I'd second Bauckham's Theology of Revelation, but only if The Climax of Prophecy doesn't count as a commentary.Number two is a three-way time between: Aune's three-volume Word commentary; Boring's Interpretation volume, and Howard-Brook/Gwyther's Unveiling Empire. Eric
Word commentary is the only real one that I have looked at - Aune, David E., Word Biblical Commentary, Revelation, Volume 52A-C
David Aune's 3 volume Word Biblical Commentary on Revelation would be the only modern commentary that I would own, if I had to choose.
Steve Friesen's forthcoming Hermeneia commentary.
Craig Keener, Revelation. I don't care much for the series, but Keener is such a good scholar that he overcomes the boundaries of the series and still manages to be exceptionally helpful. However, I'd still choose Bauckham's The Climax of Prophecy over any commentary.
It has to be John Walvoor... hahaha! Almost said it with a straight face. Honestly, I would either have G.K. Beale's or Ian Boxhall's.
I'd like to recommend a newly-released commentary that I recently reviewed: John Christopher Thomas' The Apocalypse: A Literary and Theological Commentary (CPT: 2012). Chris' contribution offers a fresh and balanced approach that is especially sensitive to interpretations stemming from multiple oral readings.