Hi guys.. sorry for all the questions..

im gonna get some new blades when i get my pipe.

im probably gonna get the modelsport 550cm blades... but do i want 3D or sport? will the 3d be any good for hovering, and learning which im doing at the mo? or will the sport ones be any good for more advanced manouvers later on?

I am not sure what they mean by "sport" , but I know the 3D are Fully Symetrical. I can only assume the sport blades would be semi-symetrical.

If I had to tell you which ones to get then it would be the 3D blades. Just more common and more usable. If your not doing 3D or any type of aerobatics then you should probably stick to wood.

i will be moving on to more advanced stuff, but i want a set of blades that will do me through learning and the advanced stuff...

i think i will get the 3d ones.... what does symetrical and semi symetrical mean?

It means what the cross section of the blades looks like. Just like wings, blades have a airfoil shape to them.

Symmetrical ones are the same on the top half as on the bottom.
Symmetrical blades work just as good inverted as they do rightside up.

Semi symmetrical ones have different shapes top and bottom.
Semi symmetrical blades create more lift rightside up than they do upside down.

Both kinds of blades probably can work inverted, depending on your negative pitch, but symmetrical blades will perform just as good inverted as rightside up.