Mac mini 1.42GHz PowerPC G4 256MB DDR333 SDRAM ATI Radeon 9200 with 32MB DDR video memory 80GB Ultra ATA hard drive Combo drive DVI or VGA video output AirPort Extreme and Bluetooth optional iMac 20-inch widescreen LCD 1.8GHz PowerPC G5 512K L2 cache 600MHz frontside bus 256MB DDR400 SDRAM NVIDIA GeForce FX 5200 Ultra 64MB DDR video memory 160GB Serial ATA hard drive Slot-load SuperDrive What does all of this mean? I understand some of it, but no one has really explained to me what all of this means. Airport is wireless capabilities for the internet, etc. But what is Bluetooth? Also, why would I buy a 20 inch Apple Cimena Display if I can get one for hundreds of dollars less money thats the same size? Is Apple ripping us off? Thanks.