Hello, I'm wondering if you guys have any advice on some speakers that I can hook up to either my computer or just a regular stereo that would be loud enough so that I can play my drums to music. Preferably under 100 dollars.

Thanks, Misha

Alright. scratch the computer speakers.
Headphones don't really work. I'd rather have the noise be around me.

First, it's NOT noise  - it's music   Second, please read some of the threads about ear protection. It's serious business.  To get to your question, you can play your computer or IPOD, whatever through a good stereo or even a boom box (most have aux inputs) and some of the boom boxes are probably loud enough. AND, if it's not loud enough, go back to my second point....  Be SAFE!

This is pretty much how I practice.  I used to use like a 100watt Stereo. Later I bought an Yorkville MM6, 150 watts per channel with two 15in. 200watt Yorkville speaker cabinets.  It was enough to practice too. Like Chris said here, a small PA.  I am now practicing to a 3200 watt PA with subs, Mains and monitor. You just want to cut the high frequencies a bit.  They are the most damaging to your ears. If you want just a little more cut use cotton balls.  These guys are serious about damaging your ears. Almost all of them use ear plugs.
I think that with headphones, the dbs may be higher because it is right on top of your ears. I have noticed my ears buzzing more after listening and reviewing recorded music through head phones at night. It sounds so clear, you don't realize how loud it really is IMHO.
I don't know of anything that is going to give your that much sound for under $100, other than headphones.  Just be careful.
                            Nutty

Pardon the personal opinion here (honestly)........

But I just know I wouldn't enjoy that.
Firstly, volume is very tiring (it's been proven in studies).
Secondly, I know I would either be BLASTING the PA or struggling to hear the music. It would effect my way of playing, I'd feel tense and in knots trying to stifle my playing in order to hear the music.
I have a little experience in this area - I've tried playing to pre-recorded music in rehearsal rooms. I've also practiced and gigged with machine driven music where there was no click available, or the click was inadequate.
Here is the thing.......
When you gig, yes you can be playing at high volumes, but 1) you aren't straining to hear the timing with all the other musicians completely ignoring you  .
You are running the timing.
Play drums to a record and you are the one trying to keep in time and hear clearly enough to feel the pulse.
And 2) the gig might last for 30-60 minutes. Less time exposure to high volume than if you practiced- assuming most people practice for at least an hour.
On the issue of hearing damage.
My audiologist categorises the basic volume of a drum kit above 89db.
That's in the area of international safety standards requiring hearing protection.
If you were in a factory you'd be required to wear protective ear-muffs.
Now play music over that drum volume of 89db in order to hear it clearly enough to practice with! 
The road to deafness.

Chris,
You make some great points here and you are right. A factory would require ear plugs if you work in an area that is over 85dbs for over 8 hours a day. I am required at work. 3200 watts is what is availible. I am not peaking out my PA by any means inside my house. With a sound meter in my room the drums are around 95dbs. The PA is very clear and I can hear really well in there. Alcan requires me to have my hearing tested once a year and I have done that now for 12 years. So far the results is that my hearing hasn't changed for 12 years. My eye sight has but not my hearing.  The music is my click track.  Played the other day to a bunch of Genesis.  Great drums but mostly all of it has an electrical rhythm track playing with it.
A lot of music does.  My point is that with head phones on, you really don't know what the dbs are.  I can use a sound meter in a room.
                                       Nutty

Let me guess.  You want to impress your friends by playing along with a record?

Use the head phones so you can hear, AND some speakers so your buddies can hear what you're playing along with.  As long as the speakers are closer to your buddies than the drum kit, you won't need much.