At $2,800, the least expensive Vaio PC in Sony's MX desktop line doesn't seem like much of a bargain these days, even for a 1.7-GHz, Pentium 4 with an 80-gigabyte (GB) hard drive, 512 megabytes (MB) of memory, the exciting "home" version of Windows XP, and two better-than-average speakers (the 15-inch Sony LCD monitor shown is $600 extra).