Focus on the features provided, rather than on the brand is the best advice I could give. Almost ALL laptops are now manufactured by only 3 manufacturers. They are rebadged and sold as 'Brand name' units!
What is the purpose of the laptop? That should be the major determining factor, as it will determine the features you need. Is it to be fully mobile? If so then a Centrino solution is definitely the best alternative, because of the improved power management and battery life. Is it to be a powerful Desktop replacement? Then perhaps a Pentium 4 M or an Athlon64 Mobile solution would be better. Is it required to double up as a games system? If so, then nothing short of NVidia FX Go or ATi Radeon Mobility graphics should be considered.
And what of the other features and connectivity. If there are features included which you actually don't need, make sure you're not paying extra for them. If there are features you DO need which aren't present, then perhaps that laptop isn't adequate.
If the laptop is to have a short lifespan of actual use by yourself, and needs to retain resale value, then the perceived 'Prestige' and resale value becomes an issue. If it's to have a longer lifespan of use by yourself, then really the only consideration you need to worry about in relation to brand name is the quality of support services provided by the 'System manufacturer'.
Centrino notebooks are only a short distance behind the performance of their Pentium4M or Athlon64 equivalents (remember, those equivalents operate at much higher clockspeeds than the PentiumM processor in the Centrino). I have a Fujitsu Lifebook Centrino laptop here, with a 1.5GHz PentiumM processor in it, and the thing handles all the everyday computing tasks I need it for with ease.
Worry about brand name if you need to, as I said, but you can be pretty confident that the quality of just about any laptop is comparable to that of any other. Virtually all Centrinos are manufactured by either Compal, Quanta and Wistron, and the situation for non-Centrino laptops isn't much more complex!