But slow is good for developing proper stroke and technique right?
Yes, slow rubber helps with control and technique development.
Chinese-style rubbers tend to be slow, especially in the short game. This means that you can touch the ball very precisely, even if it has a lot of spin on it. With Rozena, it will be quite difficult to control the spinny balls.
One of the miraculous things about Hurricane 3 is that it is slow when you touch the ball softly, but it can be extremely fast if you hit the ball with lots of power. It has a lot of "gears", whereas most other rubbers are either universally slow or universally fast. Hurricane 3 gives you lots of control when hitting the ball softly, but it also allows you to hit the ball very hard, spinny, and fast if you need to. When applying full power, Hurricane 3 is faster and spinnier than any other rubber (which is why it's the most popular rubber for professionals to use on their forehand).
However, if you don't apply full power, then you can't get as much speed out of it. Many professionals still use Hurricane 3 on backhand, but it is more common to use a trampoline-style rubber (like Rozena or Tenergy) to compensate for backhand weakness -- most players are forehand-dominant and have a weak backhand. Rozena/Tenergy will make a fast shot even with minimal power. The backhand is a shorter stroke than the forehand, and most people can't manage to produce the necessary amount of power for Hurricane 3 to be fast on the backhand.
I am a backhand-dominant player with a powerful backhand stroke, so I like to use Hurricane 3 on backhand, and I can make fast shots with it. Since you are forehand-dominant, it would probably make sense for you to use H3 or G09c on forehand. You could use H3/G09c on backhand too -- it would be much more controlled than Rozena. The only issue with using H3/G09c on the backhand is that, since it is your non-dominant side, you might have problems producing enough power to hit the ball fast. Rozena will allow you to hit fast balls with less effort.
Hitting the ball fast is an important factor in winning points and increasing your ranking, but one could make the argument that starting with a slow rubber will be better for your long term development. Slow rubber like H3/G09c will also make you strong, since you will be required to hit the ball hard if you want a fast shot.
If you get Hurricane 3, make sure to look for the NEO version of it. The regular version is fine, but it really requires quite a lot of strength to get anything out of it.
