My very humble opinion is like Marakanetz'--to me, your speaker change looks like a sidegrade. Different sound, yes. The PSBs I've heard had OK highs, though, and that makes me wonder about your source.
You don't mention your source. My second humble opinion is, garbage in, garbage out ( no I didn't make that up ). In other words, the things you feel are wrong may be coming from further upstream than you think. I don't mean your source is garbage, I have no idea what it is. But I have seen many systems here with pretty good electronics and speakers, all reproducing (quite well) the sound of an entry-level source.
I feel that, given a $3G budget, for example, if you spend 4 or 5 hundred on the source and the rest downstream you are not heading for great musical satisfaction. Turn that ratio around and now you're talking fun. Further upgrades will just let you hear how fine your source is.
If you already have EMM Labs, Ensemble or a decent Linn at the front end, of course, I didn't say anything.