Spendor S9e or ProAc Response D28

I've been eyeing the Spendor S9e and ProAc D28 and while this is your typical "how does this compare to that thread", I wanted to give some background about where I'm coming from.

I currently own a pair of B&W 703's and my gripe with them is that my ears get tired of listening to them when playing music after 20mins or so. To be a bit more specific, at low volumes 60-70dB, these speakers are very listenable but low volumes don't do rock music justice. At higher volumes (80-85db) my ears get tired within a couple of songs.

In fact, at louder volumes even if I'm in the other room doing stuff on the computer and listening to music playing from my living room I get annoyed.

Not all is bad with these speakers, they shine when it comes to movies. I only have two of them but even so they generate an excellent phantom center (note: I haven't felt the need to add a dedicated center because they are that good). They also disappear into the background. Weird thing is I listen to movie louder than I do music, yet under this activity I don't find them fatiguing.

I've been thinking of upgrading my pre but the question I keep asking myself is that maybe I've outgrown this brand of speaker (I used to have 603's).

A bit more about me and my setup:
- Ratio of music-to-movie duty: 50/50
- Listening preferences: rock+hard rock (90%), everything else literally (10%).
- Source: Squeezbox v3 (my library has been converted flac)
- Preamp/Poweramp: NAD T742 / NAD C272