HELP me bring my system into the 21st Century

Here's the deal: The wife wants a flat screen TV. I'm ready to pull the trigger, but will also need to upgrade all my components to support HDMI. I'm looking at a Panasonic VIERA TC-P50G25 50-Inch 1080p Plasma HDTV. The price is right at about $1400 and representative of my budget.

I've been fairly happy with my audio setup which is 20 years old now. The Pioneer VSX-9500S receiver has never really driven my Vanderstein 2Ci's with the respect they deserve, but it's been OK and integrated with all my components (Tivo, Old Sony tube TV, DVD player, Slingbox, etc.) nicely via RCA cables. I use to have some higher end rear bookshelf speakers and a nice center speaker once upon a time, but they disappeared somewhere over the years. I can't remember the brand, but even though they weren't Vandersteens, they rounded the sound out well when watching movies. When I had them, I still generally listened to music in two channels.

Now, I'm gonna stop here and confess what I'm sure is pretty obvious. I don't know jack about high end audio equipment other than that I like the way it sounds. That's why I'm here. I hope you folks can give me some guidance and help me step up my game.

I'm afraid my budget is limited, so I hope to accomplish this without breaking the bank. Originally when I considered this a few years back I was looking at a Rotel multimedia receiver at about $1000. Times have changed though and the new units are much pricier.

I've also wanted to go surround, but going all Vandersteen is just too expensive for me (not to mention bulky) and I've not been able to find supporting speakers that would do Vandersteens justice.

Egh... I don't know what to do here. Basically I want to update my receiver to a unit that will support my Vandersteens, HDMI and handle some of my older components. In a perfect world I'd have some nice little satellite speakers for my center and rear channels. My space, already dominated by the Vandersteens, begs for a smaller size surround solution.

You guys really know your $h!t when it comes to audio. I fear I'm that guy way in over his head who may be better served by selling his Vandersteens and getting some consumer package that he can set and forget. But I do love my Vandersteens and I appreciate good sound. Can you help?

Spending about $1400 on my TV, and expecting to drop another $750 on upgrading the TIVO, do you think I can find an audio solution for $1500-2000?

Maybe I just get a new Surround Sound Receiver and call it a day sticking with a 2 channel setup running my 2Ci's? Maybe I can get a receiver and a speaker package to support the 2Ci's and enjoy surround with my new TV? Maybe I scratch it all and unload the 2Ci's for something lower profile with good sound, maybe less audiophile and more enthusiast/consumer grade?

What say you?

I appreciate anyone taking the time to offer their insight. I look forward to your responses!

FYI- I'm based out of Los Angeles in case anyone has any suggestions of any retailers that you'd recommend.

Thanks again.