My first was an original Athlon 500 with 256MB RAM and a 20 GB HDD....Current ones include a P4 with 1GB RAM and 80GB HDD, a Tyan one based on a http://www.tyan.com/products/html/tomcatk8s.html with 1 GB RAM and an 80GB HDD (very nice, highly recommend if you feel comfortable building a system)Again, if you don't want to mess with hardware, pick up a Dell Athlon 64 dual core with 1GB ram and 160GB HDD for under $700, add an additional NIC, gigabit if you like (about $12 for a zonet / realtek from newegg last I checked) and you'll have a rocking system.