You got $10000, build a system.

Ed is correct, though I would imagine that the current market might at least net you upgraded speaker cables or some MUSIC to go with your equipment! ;-)

I think that's a good start, but what do I do with the amp sitting there without any other equipment???

If you truly need to limit yourself to $10,000.....

1) You'll probably need to go with a receiver rather
than separates. Check out something like a
B & K 307, used. This will be the brains and
amplification for your system. I've seen them
going for around $1,500.

2) Since you've gone with a receiver, you'll want to
pick efficient speakers -- ones that are easy to
drive. I recommend Monitor Audio. Get the top
of their line, used for around $5,000 for GR-60's,
center, and surrounds.

3) DVD player -- Get a Denon 1600 used for around
$300. This will also play DVD-A.

4) CD/SACD player -- get a Sony SCD 777ES, used
for around $1,500. This is a reference quality
CD/SACD player and you can also have it upgraded
further later if you get the upgrade itch.

5) Screen -- you'll have to go with a used Sony Wega
16X9 HD ready type of unit -- get the biggest and
best you can for around $1,500.

6) Cable and Wire -- Generic 12 AWG 99.99% OFC
speaker cables. Get interconnects from an AV
site like PartsExpress or AVCables.

Your speakers and source will grow with your system.
Later, when you want to upgrade, you will start by getting better amplification, using your receiver as a
pre-amp. Next, you will eliminate the receiver and get
a legit pre-pro. Next, you will buy an AC conditioner.
Last thing you will do is upgrade your cables.

Alternative ---

**All used prices.......

Anthem AVM 20 -- $2,500

Anthem MCA-50 -- $1,500

Paradigm 100's -- $1,500

Paradigm center and surrounds -- $1,000

Revel B-15 subwoof -- $2,000

Denon 1600 DVD DVD-A Player -- $300

Sony SCD777ES CD/SACD -- 1,500

Paradigm speakers?...amazing! It seems half of Canada uses this site!!!! Not that I don't like Canadians(even though they protested our war) I do! Infact, when I go to Vegas, I get the most pleasure from talking to Canadians I meet there!...very nice people, indeed.
Anyway, back to the subject...I would want to know more about your room/set up/acoustics before making recommendations. There's too many variables otherwise, that making less than ideal choices is easy to do otherwise!
Tell me more about your set up, room, and acoustics, as well as listening habits(loudness?...move around the house when you listen?..sit in one spot?..multiple listeners/seats?, etc)
There's LOTS to consider, and many can potentialy be recommended. Need more info though!