going from 80 gig ide to (2) rapters in raid 0

is it really worth the money?, im gonna order it all at once for 222 dollars, i know the difference is gonna be huge but is it really worth the money b/c the price is kind of unreasonable but i want them soo bad, any ways, after i set up in my bios and enable my raid config and if i did it all right when im installing windows it should have around a 73 gig hd when im installing windows correct? (like when it ask what partition to add it to?)

Yes, it will be a huge improvement.

However, 2x200GB sata drives in raid will be very fast, too, and offer 6x more storage space for the same money.

I would go with the latter.

nah im not much of a storage man, i care about speedddddddddddd, i dont know what to add into a hd, most of those people that fill up 400 GB of stuff is usually illegal software, movies, games , and all other illegal stuff

If you really care about speed get a single 74GB raptor. It's almost faster then the RAID and has much better seek times. Cheaper, too.

Plus it nihilizes the risk of losing your data due to raid failure.