Well, first of all an estimated budget (ballpark) would help, as well as a listing of the specific models of product that you are interested in.

I'll assume that you are building soon and that you are on a budget.

CPU: Athlon XP 2000+
I'd recommend the Athlon XP 2000 as the best price/performance processor available right now.

Motherboard: Epox 8K5A2+
I'd like to be able to recommend you get a KT400 solution but the only KT400 board available is the Asus A7V8X. The A7V8X looks like a very nice board, but it doesn't have many features over the Epox (notably: AGP 8x, limited PC3200 support, serial ATA, Gigabit LAN).

Epox 8K5A2+ = $100
Asus A7V8X = $190

So, for the money I'd recommend the Epox motherboard. However, the price for the Asus board will fall once it is more widely available, making it more attractive. (NOTE: Prices are the least expensive I could find with two stipulations. The seller had to be someone I would feel comfortable dealing with and the product had to be in-stock)

RAM: I DIMM name-brand 512MB PC2700 RAM
Name brand RAM is worth the extra money. I'd recommend Corsair or Crucial.

Hard Drive:
Try Storagereview if you have questions.

Monitor:
The only question is how much you are willing to spend. Don't skimp. It is a constant source of bemusement to me how many people will spend $350 for a graphics card but these same people will balk at the idea of spending that same money on a quality display.

Video Card: Any 128MB GeForce 4 Ti4200
I would absolutely suggest that you get a 128MB Ti4200. A good article to read at tech-report.

The Rest
I don't know much of anything about cd/dvd drives. The Audigy is a good sound card. Don't listen to anything anyone ever says about speakers. Go to the store and audition yourself. Bring your own source material and see if they will let you listen to it on each model you are interested in.