Will I get more distance from Rbz's.

I am in a bit of a quandary, I' ve been playing for about 9 months ans am down to 24 handicap.

I tend to use a v1 superfast burner off the tee as I hit it straight and usually keep out of trouble my driver is a cleveland launcher

I hit the burner (3rescue) only about 170 mtrs so could do with a bit more distance I am thinking of investing in a rbz 3wood and another 3 and 4 hybrid.

Do you think that these will get me an extra 20 or 30 mtrs off the tee while keeping me straight. something I can't do consistently with my driver

Maybe.  Maybe not.  What would be more significant in gaining more distance would be to go through a good fitting session and end up with a head/shaft combo that is suited to YOU, not everyone else.

Unfortunately i am down here is Spain and i've not found a fitting session or even a test day anywhere

Hitting the ball further is pretty much all about club head speed - and hitting the sweet spot with the club face and club path going toward your target.  The faster you swing, and the more square you hit the club - the further the ball will travel.

You said you are a 24 handicap... Keep working on your game and I believe the RBZ or any of today's drivers will help you hit the ball further.  The key is to go to a fitter and get the correct shaft for your swing.