I owned 3.5Rs and could never get past the door size room blocker physical size. I tried a wide variety of amps, both SS and tube (Rogue 150s), but found them hard to drive.
I supplemented the bass with 2 SVS subs (one Ultra and one Plus). Eventually I replaced them with Emerald Physics KC IIs, which are easy to drive 94dB, the bass is good that that I no longer use my SVS subs.
I ordered the KCIIs with the WireWorld OCC internal wiring upgrade (+$500). They include this wire in their more expensive speakers, but mine was a first to put it into the KCIIs. I was told by the assemblers that the improvement (by comparison to the basic wire) was amazing
IMHO, they are well worth the stretch
I supplemented the bass with 2 SVS subs (one Ultra and one Plus). Eventually I replaced them with Emerald Physics KC IIs, which are easy to drive 94dB, the bass is good that that I no longer use my SVS subs.
I ordered the KCIIs with the WireWorld OCC internal wiring upgrade (+$500). They include this wire in their more expensive speakers, but mine was a first to put it into the KCIIs. I was told by the assemblers that the improvement (by comparison to the basic wire) was amazing
IMHO, they are well worth the stretch