From what is mentioned
here, the mentioned specs,
should, run visual studio 2010 smoothly. Intelisense should not be an issue too.
But ayman, after facing performance problems on a previous machine, why do you still insist on purchasing laptops with such low specs...
If it's for the portability, you should really consider a trade-off between the size/weight and the performance.
If it's the price, you can always wait for another month or two.
You should at least get an i5.
This Laptop seems to be the best choice for your case -
not necessarily a Vaio, but any laptop of your choice with these specs...
Intel® Core™ i5-560M Processor 2.66 GHz with Turbo Boost up to 3.20 GHz
Genuine Windows® 7 Professional 64-bit
HDD: 500 GB (Serial ATA, 5400 rpm)
13.3 (33.8 cm) wide (WXGA: 1366 x 768) VAIO Display, LED backlight
NVIDIA® GeForce® 310M GPU with CUDA™ Technology
2 Kg in weight with built-in ODD