Quicksilver_ProAc

Hi
I am wondering about new amplifiers for my ProAc 3.8
I have been very fond of Quicksilvers amps in the past and Im looking at the silver 88 or the V4. They are simular priced but the V4 offering more power. I have always liked the 2 tube each channel princip as in Silver 88 but the ProAc 3.8 need a dynamic sounding amplifier, the impedance does not reach below 7 ohm but they measured only 85dB in some stereophile test.

Can anybody tell me the difference between those 2 amps? Or opinion on which one to buy?

regards