Make me feel all tingly inside!

[DutchBoy]

OK, now that I have your attention after that thread title...

I'm finally looking at replacing the speaker package that I have with my HT system. Just so you know, I originally bought them, or got them, as part of a HTiB I bought about ten years from Aiwa. They're little 2700s -- all identical (fronts and rears) and it came with a center, and powered sub. Not bad for what I could do at the time, and they've served me well over the years. They've done what I wanted them to, and gone through 3 different receivers (I upgraded the Aiwa two different times now).

But now that I have my HDTV, and my BD players, I want my sound.

I'm looking at slowly replacing each portion (front, center, rears, sub) over the next several months. A bit at the time, and my wife will let me do it.

After reading through several threads here and elsewhere, and discovering the wonder that is Newegg.com here's what I'm looking at:

Polk Monitor 50s (fronts)
Polk Monitor 30s (rears)
Center (suggestions are welcome, but I was looking at the CS10)
Sub (PSW10)

Now tell me, what kind of upgrade am I really going to notice here? Should I begin wetting myself in anticipation now?

I really am a complete noob when it comes to sound, other than knowing that I like it, so I'm open to suggestions. I am, however, attempting to keep it in the $500 area. Will this get me what I'm looking for at that price point?

Thanks!