Superfly, I had the NHT 2.5's a few years ago. Also in an HT type setup. They are nice speakers in many ways, but I found myslef listing to the speakers rather than enjoying the music.
I bought a pair of Von Schweikert VR3's and that was a huge improvement. Music was more, well, relaxed and enjoyable. Less glare. For the HT side, they have deeper bass than the 2.5's so I think you will enjoy them in that regard as well.
The VR3's got me going full bore into audio. Soon after, I dumped the HT.
You can find these for under $1k, and if you really like them you can send them to Albert for a total overhaul.
I went from the 3's to the 4's, and last year I had the 4's rebuilt.
Settle you speakers first, then look to other component changes.