If you want a better computer that offers more than just the core features, and supports Windows Aero Glass and other features you could get a computer marked as Windows Vista Premium Ready. These work with Windows Vista Home Premium and above, which supports Windows Aero as standard. Other features that show in higher editions such as Media Center may require additional hardware like TV tuners. 

A Windows Vista Premium Ready PC includes at least:
    1 GHz 32-bit (x86) or 64-bit (x64) processor
    1 GB of system memory
    A graphics processor that runs Windows Aero (check here)
    128 MB of graphics memory
    40 GB of hard drive capacity with 15 GB free space
    DVD-ROM Drive (internal or external drive)
    Audio output capability
    Internet access capability