I own a Mac G4 MDD, and am looking for a more powerful Mac on ebay. Possibly a G5 or Mac mini. Problem is, I am not exactly sure what to look for in all the various facts listed for each Mac. Recently, I installed a Superdrive in my Mac. Slowly I can now identify various components when looking inside. But I am a far distance from the knowledge of many on this forum. So, I'm asking for your advice. My current Mac G4 is as follows: Dual core. 2 CPUs CPU type: Power PC G4 (3.3) CPU Speed: 1.25GHz L2 Cache (per CPU): 256 KB L3 Cache (per CPU): 1 MB Memory: 2GB Bus speed: 167 MHz All four slots are occupied. OS X Leopard The above I got from the Mac itself, but am not sure exactly what everything means. My assumptions: Memory is hard drive? Dual core means two hard drives? Whatever "cache" means is beyond me. What are the basics I should know that I am getting a Mac which is faster and more powerful? For internet connection I use a telephone connection. Are all Macs equipped with a port for a telephone? Do all Macs have a internal modem? If not, what do I need for internet connection? Is Garageband on all Macs? Will my G4 keyboard and mouse work with a G5 or Mac Mini? I appreciate all advice. I'll take your advice seriously and hope to better understand when others explain Mac power to me. Thanks very much!