Don't get me wrong Bro. The Jamo 506 is ok ... IIRC I think the set goes for 19k, right? I did not go that route only because then I was not yet willing to spend that much, I'd not heard other speakers yet, and I'd not yet found PinoyDVD.
IMHO, you've got a good set of speakers there, and I will suggest you first try tuning your system so you get them to optimum. Its not, I gather, 100% about the speakers, or even all of the equipment, a significant factor is how you place them, make your settings, and even the room itself. Get them to optimum then look at improvements by upgrades and additions.
One reason having PinoyDVD is great is because it makes upgrading less painful. After the hearing the Jamo 506 set, I ended up with an old Wharfedale set. A few weeks later I was able to pass them on and head for Polks.
Okidoki have fun.