Perret writes good stuff. His particular gift is taking extensively from oral histories - as in people who were there - and weaving those stories into the bigger picture. I've read the Mighty Eighth and I think you'll like it. Good read, and well worth the discount price.
I don't think I've read "New History" but Ambrose is a pretty safe bet regardless. He is wonderful at keeping the story moving, at narrative history. My favorites of his are probably the one about the Lewis and Clark expedition, and his D Day book...and of course Band of Brothers, which goes without saying.
Except I said it.
If you haven't checked him out, you'd probably also enjoy John Keegan. Loved his "Six Armies at Normandy" during the WW2 timeframe, and you almost can't go wrong with anything he's written. Honestly probably like his stuff better than Ambrose. Wrote some classics like "The Face of Battle", "The price of admiralty". As I recall he was a professor at Sandhurst for quite a while.