I tend to find that most monitors with speakers, sound rather 'tinny' in performance, so I put very little high specification on this. A couple of cheap or reasonably priced speakers usually takes care of that.
With regards to the rest, specifications are changing all the time, and the market shows this with price drops, and perhaps Ebuyer or Amazon are a good example of this.
Like yourself, I have been in the market for a 'good' monitor for some time now, but it tends to get very confusing, and the only way I have considered, is by reading reviews from good sources.
Sorry for not being more helpful, in perhaps suggesting one particular model or brand, because that might be bias on my part?.