VT-100 MkII matches best with what preamp? HELP

First off, you have great synergy with ProAc and the ARC VT100 MKII. I have been a ProAc fan for years and have used a VT100MKII with 4 different pairs of the ProAc Response series speakers including the Response 3.8 and now the D80. I would agree with the others here that have recommended an ARC tubed preamp. I personally use an ARC Refererence 2 MKI which is a fantastic match for ProAc and the VT100. Of course you might want to spend less for a preamp but any of the ARC preamps would probably be a good choice depending on the price and whether or not you want remote control. Tube rolling also makes a difference and I use the same tubes in my Ref 2 that Woodburger uses for his LS5. I would also suggest that you use the balanced inputs of the VT100MKII since it sounds better that way in my opinion. Therefore I would look for a preamp that has balanced outputs like the LS25, LS5, or the Reference series. Good luck.