Inspire vs MegaWorks at HF?

I’m thinking of buying a MegaWorks 550 set. Unfortunately one thing worries me. I have at the moment a Inspire T3000. They sound pretty good for their price. But will the MegaWorks set have better high frequencies?
On one hand there is the very high price and this should mean the speakers are really good. On the other hand the MegaWorks’ satelites don’t have a tweeter, which makes me uncertain if they can produce those highs of the T3000.
Do i worry for nothing?