Window 7 vs XP (20)

1. In my opinion, Windows 7 is much better. Now, I am using win 7 ultimate with 4 GB RAM and intel core2 quad CPU. It lags when I am using 3D software(3ds max , rendering) in XP but not in 7 even I open two at the same time.
2. I suggest Win 7.
3. Maybe you can wait untill it's not so hot to about $1XXX. Or you buy other verson of 7 or XP. I prefer Win 7 Ultimate.

1 and 2. If you need to buy, Windows 7 is better. I tried a Win 7 Ultimate version on a P4 2.2GHz CPU with 1.25GB memory. I was so impressive of its performance. Because it is new, I am still monitoring its performance but at least it is better than Vista. Windows XP still has a lot of bug, I will suggest you to try Win 7.

3. Depends on what function you need. Come here http://windows.microsoft.com/en-us/windows7/products/compare to see the comparison.

If you need BitLocker function, you can go for Ultimate. BitLocker can encrypt your entire harddrive, this is good for laptop. In case you lose your computer, you won't expose your data to someone else.

win 7係好過 win xp,因為win7同xp一樣咁爽,但功能就多過xp,大部份嘅軟件都支援,和冇必要,唔好用64bit,最好就用番32bit ,咁好多嘢都用得番..
$2000~3000,貴就貴D,睇下有冇其它方法可以平d啦!!!