I was originally gonna buy a mac mini but decided to spend a bit extra and get a Power Mac instead. I would appreciate a little feedback from the experienced users on the following:

1) Dual or Single CPU: The price difference is reasonable. I'll mainly be using the system for everyday work like Office, Internet, P2P etc with a bit of a Photoshop. I've never really done any video editing or sound production but I might get a video camera in a couple of months and hook it up. What about the OS? Does a single vs dual cpu make a big difference using the OS? Also, is 1.8GHz G5 a decent CPU.

2) Video Cards: The FX5200 that ships with the Mac isnt that great. I have an x800 Pro in my PC. Would I be able to use that card on my Mac? I do like to game every now and then.

3) Hard Drives- How many hard drives can you connect in the Power Mac? Can I simply go out and buy a hard drive and add it to the Power Mac? Also, is RAID supported onboard or do I have to look for an add-on card for that

4) Memory: Will any DDR memory module work fine that works on the PC?

5) If I order a refurbished system from Apple now, will it come with Tiger? Also, do educational discounts apply to refurbished systems?

Thanks
-Abbas