I just bought the 1080 a few weeks ago and have been comparing it to my 436HP. I initially said the 436HP was by far and away the winner, but after a few weeks, there are many things I like about the 1080 in terms of displaying frequencies, ability to program from the Library without need for a computer, and the audio quality that I really like. The sticking point is the P25 decode quality. In some cases, it is as good as the 436HP, then the superior audio makes the 1080 a winner. But I still have many P25 stations here in LA (notably LAPD) where some stations are really garbled on the 1080, and are clearly decoded with the 436HP. I experienced the same problem in Phoenix last week on their RWC simulcast sites when we visited our daughter, son-in-law, and grandchild there. In some cases, the 1080 was great, in other cases, pretty garbled (Donald Duck sounds).
Fix that issue, and write some third-party software for the PSR-800/WS-1080, then it would be a much better radio. I like having both the 1080 and 436HP, which are probably the "top-of-the-line" non-commercial (eg, Motorola) portable scanners around. But if P25 is a big issue, I would still stick with the 436HP if only had my choice of one scanner.
Steve AA6IO