"Hewlett-Packard took the top spot surging more than 29 percent and capturing 20 percent of the market. Dell remained in second place with 15 percent market share, despite dropping two percent quarter to quarter, while Acer gained 29 percent to finish third with 13.3 percent market share.
Rounding out the list are
Toshiba (9.8 percent share),
Lenovo (8.4 percent),
Fujitsu-Siemens (5.3 percent),
Sony (5 percent),
Asus (4.4 percent) and
Apple (4.1 percent)."
Best performance is a debatable topic as most manufacturers have models available at the top end of processor speeds and features.
http://in.answers.yahoo.com/question/index?qid=20080130074439AAWIXjt