Internal HD Upgrade of Mac G5

It's time for me to upgrade the internal HD on my G5 (Dual 1.8Ghz Power PC; 1.25 GB DDR SDRAM; OSX 10.4.11). The current HD is only 80GB, I have an external 200GB HD, but I do a lot of video editing. The internal HD is virtually full (mainly because I have installed Final Cut Studio) and the project I currently am working on is going to fill my external HD and I need at least another 180GB.

What internal HD's in the 250-500GB range could people recomend? I saw this Samsung on Amazon:

http://www.amazon.co.uk/dp/B000MSRAEY/

Is this suitable? Any advice, gratefully received.

Cheers.