[G4] 1.25 MDD Hard Drive Replacement?

[jonny]

Good morning!

As part of restoring function to my beloved FW400 MDD, I put the two 
350 MB ATA hard drives in FW enclosures to boot with my old G4 450. 
That is how I am getting along until the MDD is back up and running.

I would like to look into permanently replacing these two internal 
HD's in the MDD when I replace the power supply.

SATA drives are, to my limited understanding, fast and the direction 
I should be looking.

I'll need a SATA card to drive them.  I have one slot open.  Brand suggestion?

Any suggestions (or limitations) on jumping into two SATA Hard 
Drives?  Seagate 500 MB SATA are $60 apiece, new.  Requesting wisdom. 
I'm in this for the long haul.  I love the MDD and if I can keep it 
running for another 10 years or longer, then I am happy.  :-)

Thank you, as always, for your insight.

jonny