Someone else posted on another thread that scan speeds may not be as fast with newer digital scanners on analog because scanner looking for different digital signals, NAC, or color code, RAN, etc. I tend to agree. So I think using a good old fashioned analog scanner is a wise idea to strictly monitor air.
I own the 780XLT, BCT15X, PRO-2042, BC125AT, PRO-43, and the BR330T, among many others.
They all work fine for monitoring air. Most do better also than my 436HP or HP-1/2 for air and, and high vhf.
Agree that nowadays, the BC125AT and BCT15X are probably the most available best options. 780XLT and PRO-43 also great on air. But all, including the BR330T are very good analog scanners. The deal that Scanner Master has on 330T is great. Already had one, bought another one for about $150. Will find some use, either myself, relative, or friend, who wants to use a good scanner.