FreeBSD as Server

[Alexander]

Hi2all!
Sorry, if my english is no good!
I am ISP admin. All my server work under Linux, but I want to try for 
this function FreeBSD. Once I used server under FreeBSD 5.3. Now I 
testing FreeBSD 6.0.
I liked functions such as dummy net, simple configuring, etc. But in 
FreeBSD I don't have alternative FileSystems exclude UFS and UFS2. On 
high-loaded FileServer is good idea to use XFS or ReiserFS, but this FS 
don't supported as well as in Linux. How I can to solve this problem?