On the question about import. I have never gotten a OBJ to import correctly, however, I have imported many other formats and they were right. If I understand you correctly, no matter who creates them they have black textures. Also, I have used Bryce is version 2. I actually, have not imported anything yet with Bryce 6.1. Been just working inside the program. I will try it out and see if it works.
As for the Carrara vs Bryce. I own Bryce and that is why I use it. If they offered a $6 deal on the full blown Carrara (instead of basics), then I would own that as well and see how much better it is. I don't doubt it is better, just can't afford it on my budget right now
JH