Your website's buying guide is helpful but for me it's too generic; it's for a general audience but not for someone with specific features in mind in a market flooded with any number of configurations. I'm looking for a searchable list of products according to specific features, e.g. by processor type and speed, screen resolution? IPS? RAM? HD or SSD? backlit keyboard? AC wifi? bluetooth 4.0? on sale or clearance pricing? refurbished? It would be most helpful if a comparison matrix were available, perhaps with price change email alerts. I haven't found such a site, but maybe there are some out there?