Definately buy the P25-S607 or 609. You can probably get the 607 for under $2000.00 where as the 609 will run you about $2600.00. There are subtle differences, but for the money the 607 is a keeper!
1. NO. However the 5200 was the first and remains dedicated to DX 9! There can always be better GPU cards,but Toshiba did not go with anthing else and upon upgrading they kept the 5200. That says something!
2. The Hard Drives come as follows: 607 has a 60 @ 5400. The 609 has an 80 @ 5400.
3. There has been some talk about the RAM. As I understand it, the higher spec'de RAM will work. I would check with the RAM supplier when you are ready to purchase the upgrade. But you may not need to buy an increase as the 607 comes with 512 and the 609 comes with 1 GIG.
I have the 607 and bought the RAM boost to 1 GIG immediately after purchase. The 60 GIG HD is plenty big enough and everythig else is the same. I LOVE it and have never looked back! I use it for home and business and game play. I play the Rainbow series, Neverwinter Nights, Command and Conquer Generals with not a single glitch. Check the spec's at Toshiba's site. I highly recommend either one! Good Luck!