Upgrade from Proac Response 1SC?

I think you would like the 2.5's. Its kind of like the 1sc, only bigger.

@cooper52 I am resurrecting this old thread since I am considering a D2 purchase and am waiting with bated breath to hear what came of the auspicious start of a beautiful friendship. :)

I've owned Response 1.5, 2.5 and 1sc's. As much as I like Proacs I feel Speaker Art is a better speaker in every way. 

Badri, just to follow up, the Response D2s and I are still friends. It actually took some time for the old Proac magic to emerge, as I think the previous owner(s) of these speakers didn't play them enough, and they take about 100 hours to find their voice. I thought at first they were a little too bright, but with a few minor tweaks (they like Proac's standard jumpers a lot better than the Kimber Kable ones I tried) they've calmed down quite a bit and I'm really enjoying them. Wonderful detail, excellent imaging. I'd say they're still a bit on the bright side but amplification plays a role in this and I've been giving a little thought to changing from my present Hegel H200 to something like a Modwright KWI200 which has the reputation for sounding fuller.

I made the move from Proac 1SC's to B&W Nautilus 805 Signatures. I've been very happy with the upgrade. Of course, 805 Signature's are many years old now and not easy to find, but it is a really great speaker that looks great and is easy to fit into most rooms.