I will second this opinion about SE 5-way Reference. My recently acquired SE 5-way are certainly top of the line in terms of their technical abilities and my sonic preferences. In fact, having owned both 8.A and LCD2, while 8.A being generally good monitors, I find them somewhat unnatural and unbalanced when compared with the SE 5-way. 8.A can also have harsh and sibilant highs from time to time to my ears, when compared to smooth, very linear and much more extended 5-way's. Isolation is also much better, obviously.
If you're looking for an upgrade to LCD2/3 and overall reference sounding monitors, that would be 5-way's in my opinion. Perhaps there are some others worth looking into as well.