Which Distribution ?

Here were my initial constraints for selecting a distrib :
- Stability
- ZFS support (including root installation & tutorials available)
- Radeon HD6310 support (maybe at some point i want to plug my server in my TV ;-))
- USB install

so I came up with this non-exhaustive list :
- OpenIndiana
- FreeBSD 9 or its desktop-oriented version : PC-BSD
- Ubuntu Server 11.10

I tried all these distributions and here is my feedback :

- OpenIndiana 151a : easy install, native ZFS support but HD6310 not supported ootb, lack of documentation

- FreeBSD 9.0 : very robust distrib, native ZFS, great documentation but again lack of support for HD6310 and ports take time to install...

- PC-BSD 9.0 Isotope :  same than FreeBSD, PC-BSD installer supports ZFS install on root (but only 1 disk not on 2 mirrored disks), but again lack of support for HD6310 : could get it working in 1920x1080 but couldn't open a console with Ctrl-Alt-F1 or system will hang-up or even reboot...

- Ubuntu Server 11.10 : server install allows Software RAID-1 support, HD6310 supported out of the box, great community and software available, native ZFS support but through ppa...

My choice : the last one, Ubuntu Server !!

Even if I couldn't manage to install ZFS on my root system with Ubuntu, I chose to stick with it and did a Software RAID-1 with my 2 system disks instead.