Need help installing or purchasing new 4x SATA controller

I have the Promise SATA300 TX4 SATA 2.0 controller and don't want to rebuild my kernel with a server that is in production. I have had problems in the past with kernel rebuilds and need to get this card to work under Ubuntu...

Is there any 4 port RAID controllers that will work out of box with Ubuntu?

No one can recommend a working SATA controller?

I'm currently looking to expand my DIY NAS with more drives and have run out of SATA ports, which I'd like to upgrade without too much hassle...