Worries

When ive got me amp on nice and above half... speakers move back n forth a bit... fair enoguth but if it goes to about 3/4 they move a lot more... just a bit worried ... should i not be pushin that much or is them moving A LOT just part of how it all works

[ShinObiWAN]

Its all irrelevant really how far the volume control is set.

What determines how loud a speaker is at a fixed volume is speaker sensitivity, impedance, enclosure type and a whole host of other factors.

Distortion is what you should be concerned about and then running high volumes levels for extended periods, which will shorten the life of the speaker.