Advice for possible convert to Ubuntu

[John]

Hi,

I'm currently running SuSE 10.0 on a server using only command line 
access. I'm looking to convert to Ubuntu server and have three questions:

1. Does Ubuntu's installation allow for command line only operation?

2. Does Ubuntu support Reiser file system or must I convert my secondary 
disks to Etc3?

3. Can I simply copy my existing .conf files over those generated during 
the installation process or do I have to start from scratch? (I'm 
running bind, dhcp, postfix, CUPS, Apache, PHP. postgresql & Subversion 
among others.)

TIA

John