VIA is not the only chipset that can use AMD processors. nForce2 (and now 3) are considered very stable chipsets for AMD.
Regardless, though, any literature you've found against VIA is very very outdated information. There were issues with it way back when it was on the K133 model, ie. about 5 years ago. The issues were quickly resolved and VIA has been stable for AMD ever since. However, rumour and misconception, once started, tends to persist.
AMD are preferred for audio not only for cost (cost is getting similar anyhow, finally) but because they are better performers in the audio world. Most digital signal processing uses 32-bit floating point maths for calculations, which the AMD is a documented performance winner in, compared to Intel. On top of that, for similar performance speeds, AMD runs cooler-- something to consider. Pentium 4 also experience "denormalization" which can cripple a project using certain plug-ins, unless you take precautions. And finally, people are moving to AMD because it offers a cost-effective 64-bit solution which will enable an upgrade path not only for their hardware but for their OS.
NOW, all that said-- even AMD fans are silly not to mention that the Pentium-M (the processor used for "centrino" laptops) runs more efficiently than a standard Pentium 4, which means higher performance-to-GHz ratio, as well as cooler operation. In the laptop recording world, the Pentium-M is considered quite desirable as far as processors go.
Given your needs for recording, I still have to seriously question whether you need the most expensive software available. I admit, I'm a bit of a fan so this is coming from a biased perspective, but have a look at Tracktion 2, which is to be released this month. As a bonus, it'll include Amplitube LE, which models 3 different amps-- A Marshall Plexi (I believe... some sort of Marshall anyhow), a Vox AC-30, and a Fender Twin. There are other plug-ins to be bundled with it (the papers aren't signed, but it looks like the popular Linplug RMIV drum machine will be there, along with 2 GB of drum sounds), and other issues have been addressed since v1. For $199 msrp.
Greg