Nice! I've never hit with the Vacuum Pro or Comp, but the VT Pro 98 is a dream. I picked up some of the Pro Classic 98 Retros and am now waiting on some Pro No 1 FTs, which are extended. Love love love the Retros for doubles. They are so maneuverable at the net, and solid on the return.
I snagged the Pro No 1s to experiment with an extended frame in singles. I used the Black Granite Pro No 1s for a couple years, but am finding as I get older (49 now) I need a little more help from the frame during extended ralleys. Hoping the extra 3/8" adds that.
Admittedly I used to frown upon people using different frames for singles and doubles, but am now going to experiment for a bit with this approach. I serve & volley of both serves in doubles, and look to come in off my first chance when returning, but hug the baseline in singles, so I guess it makes sense I'd want something quick & maneuverable at the net for dubs, but something with slightly more 'controllable power' in singles.