Never tried a Rectifier - but they're known for their high gain modern sound.
I've got a boogie dc-3 and it is the most versitile amp I've ever played. I can get almost anything I want from it. I can't get that wide open power tube sound. Boogies seem to let the pre amp tubes play a bigger role in the sound. Because of that I keep my Marshall around.
When you try a boogie, keep in mind you've got to do a lot of tweaking. There's a million good sounds in a boogie, and probably 2 million bad sounds. You've gotta get to know the amp - so while Lopp gave good advice in trying it before you buy it, another way to go is buy one used, play with it for a couple months, and if you don't like it sell it for the price you paid for it.