If you like a very cheap price with decent spec. I suggest you should build your own PC. I've built my own PC: AMD 64 bit 4400+ Processor, 4gigs RAM, nVidia 8500GT GeForce, an asus SATA/eSATA2 motherboard and a nice Vista Ulimate 64bit OS. All cost less than 600$.

Built computers/laptops selling in stores are ridiculously high priced, because many people don't rather want to build, they just buy instead, hence the double price.

Building your own PC is actually fun! Building your own laptop is not very easy... unless you are buying a custom laptop BUT the price will be a bit higher.