sirquack, thanks for the speedy reply.
My budget is around $500 dollar for the pair.

I often hear that a good/high-end speaker needs matching preamp/apm to get the best result.

What should I do in my case? I am hopping to get the best result using my current all-in-one receiver.

Can I add a simple pre-amp to the receiver? will it make a difference?
Would I be wasting my money if I go for a more expensive speaker model?

Thanks again.