I have an SR and I find it great. I use three handpieces for rotary carving and just picked up a fourth for recriprocating , but haven't tried it yet. I find the reverse useful, though I don't use it often, but when I do, it is indespensable!!
The standard SR has plenty of power for Pine and Mahogany, and even for Cherry, Maple, Ebony, Holly, Walnut, Afermosia and a host of others. Take your time, and try not to hog off too much wood in each pass/cut. Hold it with a good grip while you get use to it, it can hop away on you and trust me, a touch from a Typhoon burr will take a lot of skin off really fast!!!
Get a good selection of burrs, from coarse, medium, fine, some steel cutters and then diamond, ruby and stones, depending on what you're carving. Enjoy.