I preached through 1 Peter over a year ago and am currently preaching through 2 Peter now. Lane's list pretty much sums it up. One thing to keep in mind, though: 1 and 2 Peter are not always grouped together by commentators (2 Peter is often grouped with Jude b/c of the similarity in the two epistles).
I will add a third recommendation for Adams. It is a lot of material, but it is excellent. You will find yourself reading 10 or so pages of fairly small font type in two columns on a single verse, but there is much gold in his thoughts.
Use your mouse to swipe a name and sermon title, then Cntrl + C to copy, and Cntrl + V to drop that same copy into a Google search. It is slightly surprising just how many of those sermons can be found on the Web these days.
My church is currently going through 1 Peter in Sunday school. We are using Clowney's commentary as a guide. We just started and the Clowney books are in the mail, but I will try to update when I get mine Sunday and have a chance to read through it.
I have Nisbet but have found him very long winded. Given the age he is probably very close to the Puritan era. This would make him both long-winded and insightful. I will post elsewhere on verse 7 and his observations.