Getting started with linux and raid

After a recent drive failure took down one of our servers and it took 2 days
to fully restore all services, I've been asked to investigate replacing the
server (Sun Ultra5 running Solaris 6) with a Linux (probably RedHat Linux 9)
server and a RAID array (we'll probably be using RAID 1). I have a little
bit of experience with Linux without RAID.

We've got most of the new hardware selected. We've got a Dell dual 450, a
SCSI RAID cabinet and all the drives we'll need. I just need to find a SCSI
RAID controller card. I've been trying to find reviews or comparisons, but
I'm not sure what I should get. I've seen a lot of discussion about software
RAID, but I was specifically asked to look into hardware RAID. How do I go
about selected the best SCSI RAID controller?

Thanks!

--Steve