History of Rome

Toss out question for any avid classical history readers out there...

As I go through working over the reading lists for the High School Humanities Program, I'm trying to decide whether to keep Moses Hadas' History of Rome as the high level secondary source on Roman history. I recall it's virtues as being that it's quite concise and readable (I don't want the secondary source to be taking up all sorts of time that could be better devoted to reading Roman authors) yet gives a pretty good feel for Roman history and the ways in which the Roman character changed over the course of the city, republic and empire's history. Hadas war primarily a historian of literature, and it shows.

However, it's out of print -- though still fairly available used.

Does anyone know of a fairly concise and respected history of Rome that's still in print which I should look at as a substitute? I'd be curious to read over something that's more recent which might fill the same niche (Hadas' history was, I believe, written in the early 50s.) However, I haven't heard of anything that sounds like it's trying to do the same thing. Suggestions?

(cross posted on Humanities Program blog)