Well it all depends what the purpose of the computer will be and of course how comfortable with Linux you are. For instance RH and Mandrake are great for desktop enviroments, easy setup and such, while Debian is excelent for the servers. On the other hand have you looked into FreeBSD? I have it running on a 200mhz Pentium with 48mb as a file server and so far so good, not the greatest performance, but what can you expect from a 200mhz comp?