Ok... For those of who not following my inconsequential gripes, my laptop recently died. I'm in the process of acquiring a new computer. Last week I bought a Asus U6SG laptop. A terrific machine but an awesome mistake. I has no XP drivers and, while this can be handled, installing XP breaks the warranty. I'm going to returning it tomorrow (Monday). Already talked them in.

I've spent today the whole afternoon around shopping malls looking for a replacement. Nothing useful. So I changed my strategy. I'm going to split my budget in two and buy tomorrow a desktop and order a laptop.

The laptop will be:
Lenovo Thinkpad T61 (customized)
15.4'' Widescreen
Intel C2D T9300 2.5GHz 800MHz 6MBL2
2 GB DDR2
100GB 7200rpm
SUSE Linux Enterprise Desktop version 10

I will need to order this from UK. With a discount of 100 Euros, it will cost me around 800 Euros, 900 USD.

Now, for desktop I'm going to buy tomorrow I need your help in understanding the hardware involved. I have so much to choose from that I need a quick crash course in recent hardware. Ever since Pentium 4, I lost track of the developments.

So...

- What exactly is the different between Intel Core, Core 2 and Core 2 Duo?
- Looking at two Core 2 Duo, one the E8400 3Ghz and the other a E4500 2.2Ghz, what's the approximate ratio in loss of speed? How do they compare to a P4?
- What's the difference between Core 2 Duo T and E series?
- Are there any problems between SATA hard drives and XP?

Folks, help me decide.