Hi I need your recommendation and advise on my choices of notebooks. I need them for work purpose and I need to install a software which seemed to work faster under XP OS and slower with Vista(well that's sort of understandable why). Mobility is also quite a big factor for me. I have 3 notebooks to consider but I really don't know which to choose. Can you please give me your recomm. based on these 3. Thx.

Brand
1. HP Pavilion TX2032AU
Sometimes I may need to show certain things to my clients so having a tablet pc is a bonus. This seems to be a really good choice and good value but I have heard of the heat problem. And it's Vista, I can't downgrade unless I void the warranty which is a no-no for me. Maybe slow and hot but still I think it MIGHT be a good choice. The price is very good for me!
2. EEE PC 900
Mobility and price is the biggest things that interest me on this. Problem is that it might not be that long lasting and I need to buy separate optical drive and etc to make up for lack of space.
3. Kojinsha
I wish I have the money to buy the latest Kohjinsha! It's almost perfect for me but the price is sky high. Do you recommend this brand? There are some who sell certain model(I forgot which) that is about RM3000 something, should I spend that much? Is it really worth the price?

Budget
Somewhere from RM2000 - less than RM3500 max!

Specs
I don't really know a lot of techie stuff but I know I must have a notebook that runs fairly fast and efficient. And light.

Size
2Kg or less is best. Mobility purpose.

Does that mean if I use battery then Vista runs even slower? Wow I don't want it slow...I need to use the internet with my work so if it's slow that's no good.