Bitflipper, if the Adams were doing it for you why not just update to another Adam model or maybe one of the Eve monitors which I believe are designed by a former Adam engineer. I have never heard the Eves but Adam because of the tweeter have a very unique sound to them. Some people love them and others hate them. Like everything else on earth. If you have been working with the Adams for a while it's going to be tough to switch to something other than Adam or possibly Eve (I just got that line! lol !)
Like I said, Focal is probably the closest as they have a crisp sound similar to Adam.
Dynaudio is more laid back, some people liken them to hi-fi speakers which is a little harsh IMHO.
JBL within each model range offers a solid, dependable monitor. I've worked with several models (not the 305/308 though) and have always found them to be easy to mix on.
I tend to be conservative and prefer a smooth sound. I'm using Event ASP8 with Sonarworks and they are excellent for me and my mixes translate well. I have heard the 20/20 and 2030 Events but they sound flabby and muddy to me compared to the ASP8. I've also worked with the Opals and they are stunning monitors, especially for the price.
From what I am seeing of the current monitor market, the trend is toward ultra bright sounding monitors. I prefer the smoother sound as it's less fatiguing to my ears.
I would seriously take a trip to a local shop and listen.
Also there is Sonic Sense that do non partisan comparisons on YouTube. They are fairly accurate believe it or not. No substitute for in person listening but you might be able to shorten your list a bit. Here is one comparison:
https://www.youtube.com/watch?v=jFKnGNIa58c