RE: Learning 3d
EDIT: Sorry for some odd reason I was reading sukhoi and thinking yak...so pardon my initial response.
Yes, the sukhoi should be just fine for 3D flying. I havent seen one yet, but based on what I can see from pics, its got all the makings of a fine 3D plane. Looks very simular to a shockflyer and they fly great!
If you're an accomplished flyer, Id recommend any of the shockfliers as a first 3D plane, but the specific ones Id go for is either a Yak54 or the Edge540 shockflyers, as they are best suited for 3D in my opinion. When built light, they are very docile, yet maneuverable planes. The shockflyers are surprisingly fairly resilient. Even a bad smack-up can usually be fixed with a bottle of foam-safe CA.
If you're still learning the basics of aerobatics, I say download some plans and build a Fanfold plane. You'll save quite a bit of money, going this route while you are banging things up learning.
I wouldnt recommend the Tensor4D for a beginner to 3D to learn on. While its certainly a VERY capable plane, it can be a handful to fly, even for experienced pilots. This is mainly due to its odd flight charectoristics. Its also EXTREMELY fragile, and wont take much punishment. One good smack, and its toast. Ive been through 2 of them myself. At $50+ for a kit...it can be an expensive way to learn.