I am thinking about upgrading my speakers. I have the Onkyo TX-DS989 and I think it's time I upgraded to THX-certified speakers. I figure I'll start with an upgrade here and there - to surrounds and maybe eventually to my front speakers. Anyway, I have no idea what the range is with surrounds or fronts is from the cheapest to the most expensive. I want to keep all the brands the same, so I just want to know if anyone out there has any ideas and websites to visit and prices. Any info would be appreciated! Thanks!