A little advice from someone that owned both a Rectoverb and Dual Rec...
Yes you can pull two tubes and rectifier tube from the DR, but to me it didn't sound the same as the Rectoverb/Single Rec.
The ROV/SR just seemed to break up better and are more usable at lower volumes. The DR with tubes pulled still needed to be pushed and seemed to lose some charachter. I wouldn't rule out an SR until you can A/B it against a DR. The older two channels (Rev C-F) to my ears always sounded better without tubes pulled and through the whole volume range. Never been wild about 3 channel models and while Rev G's sound good, they can be hit or miss from how the amp responds at lower volumes and with tubes pulled.
I always caution guys who post similar posts. Go for the DR for the options (Channel assignable loop, bold/spongy, el-34/6l6 bias select; series 1 SR's did not have this option, or vacuum tubbe vs. silicone diode) rather than "I can pull tubes and bring the wattage down." Both amps are great and I'm sure you'll be happy either way. However pulling tubes does not always produce result that DR owners expect.
Best of luck