You really could go broke on this book, even more so than Luke.
First-rate: Barrett (make sure you get the second edition, pub. 1978), Beasley-Murray, Brown, Carson, Hutcheson, Keener, Kostenberger, Lincoln, Morris, Ridderbos, Schnackenburg (very hard to obtain, and usually outrageously expensive, but worth it), Pink
Second-rate: Bernard, Blomberg, Bruce, Bultmann, Godet, Hengstenberg, Kruse, Lindars, Luther, Sloyan
Third-rate: Macgregor, Morgan, Tasker
Forthcoming: Bauckham (NIGTC), Michaels (NICNT), McHugh (ICC), Thompson (NTL)
Conservative: Carson, Hutcheson, Keener, Kostenberger, Morris, Ridderbos, Pink, Blomberg, Bruce, Godet, Hengstenberg, Kruse, Luther, Morgan, Tasker
Moderate: Barrett, Beasley-Murray, Bernard, Lincoln, Lindars, Sloyan, Macgregor
Liberal: Brown, Schnackenberg, Bultmann
Of the forthcoming volumes, Michaels will be conservative; Bauckham will be moderate (and essential!); and McHugh and Thompson will be liberal.