Windows Vista is out for retail this January. The best option is to wait a little longer! But if you must buy a computer now, make sure that your computer is "Vista Premium Ready" and not just " Vista Capable".
The reason being, Vista capable PCs and laptops will miss out on the Windows Aero (Authentic, Energetic, Reflective,Open) visual experience of Vista. Only "Vista Premium Ready" machines have the graphical muscle to run the resource intensive Aero.
A Vista Premium Ready PC would need at least a 1 GHz processor, 1 GB of RAM, and a graphics card that supports direct X 9, with 128 MB of graphics memory. Windows marketplace has a list of Microsoft approved Vista Premium Ready Laptops.
Windows Vista itself comes in four editions - Vista Home Basic, Vista Home Premium, Vista Business, and Vista Ultimate. Get the lowdown on these editions here.
Jay, from Bangalore