Original ProAc Response 2 vs. Gibbon Super 8

I have a pair of the original ProAc Response 2 with stands and am thinking of replacing them with the Super 8. Could anyone who has experienced both speakers tell me if this would be an upward move. The following components will be connected:

Quicksilver KT88 monos (60watts)
Reference Line Preeminence - Dual mono passive
CEC TL2 transport / DIY DAC
Merrill/Scillia MS2 TT
Michael Yee phono
Thanks for varying responses. I think I will stick with the original Response 2. Until I find a local auditioning spot, why gamble. - Thanks
I had my Response 2 woofers re-foamed by Millersound and have been VERY pleased with the results. I've had 4 prs of ProAcs over the years so I suspect I would have heard any degradation in performance.
I have a pair of Response 2s that need re-foaming, could you tell me how to contact Millersound? I just can't swallow the $500 apiece replacement fee for new ProAc woofers.
I will have to disagree that the Response 2 and the Devores are very different-sounding speakers. I owned the Response 2, twice, and even had the woofers replaced at one point due to the deterioration as mentioned above. Later, I owned the Devore 9, which is probably very similar to the 8. And many, many speakers in between (I now have the Devore 0/96). Yes, one is a monitor, one is a floor stander. But they have in common: very quick with great "momentum and flow," they are both very "musical" as opposed to ruthlessly revealing, but can still tell you about your associated components; well-controlled, tuneful bass that goes down just far enough to provide some impact. Both have clarity and image "out of the box" very nicely, although the 8s should have a little more scale and impact. The Response 2 has a bit of a "midbass bump" whereas the Devore 9 (and I believe the 8) was more flat in the bass, so this could result in a difference in how they are perceived. So yes, it may be more of a lateral move, but if you enjoy the Proac 2 "sound," I bet you would also enjoy the Devore "sound." You might want to consider picking up a pair of used 9s, I found them enjoyable in much the same way as the Proac 2, but with greater sense of scale and impact. Also, they both have friendly impedance curves for use with a wide range of amplifiers.