My suggestion is that you go to a shop and do some listening. The suggestions are many, especially at that price range. Call manufacturers and find dealers in your area. Try these:
Oz Audio
Boston Acoustics
Rainbow
Arc (ACS)
Alpine (type-x)
Polk (SR)
Focal
Hertz
Morel
DLS
Dynaudio
Exile (XTEC)
Zapco
a/d/s
MB Quart
AVI
Kicker (SS)
There are many other options I probably haven't thought of, but the point is this: Audio is a very subjective thing. We can't tell you over a bulletin board what you'll like best. If I know there's something you like, but can't find, I might be able to suggest alternatives based on your preferences, but even that's a gamble. Without even that much to go on, what can I recommend?
If you're going to put $500 down on speakers, you'd be wise to do the groundwork and go out and find something that works for your ears. $500 is a considerable investment. You shouldn't buy something with just our word to go on. At that price, you have a lot of very good options.
Oz, ME180 not bad ,little too warm I think,something missing
Bostons , Pro 60 maybe
Rainbow , Cmx too bright but very clear and clean would like to hear Profi 265
Arc ,nowhere to hear them but some of them use same tweeter as CMX, silk tweet maybe
Alpine, out
Polk, nowhere to hear MOMO's just ok
Hertz, will listen to Energy
Focal , K2P pretty good little harsh could be warmer, pick so far
ADS ,listened to ads365 pretty clear brighter than Focal
Morel ,like to hear Hybrid or Dotech Ovation
DLS, no where to hear them
Dyn, would like to hear 220MK2 or 240MK2
The rest don't know. Alumapro was suggested,but I think I might stay away from the aluminum woofer based on the CMX
I never thought picking a speaker would be so blasted hard.Probably would like a silk tweet better. Something warmer than the K2P or less than the OZ. Glad I'm not in a big hurry,gotta save up some cash .