We’ve been tracking the Envy 4 and Envy 6 for the last few weeks. After some leaks, and some confusing official information from one of HP’s sites, everything has been made clear — the new Envy 4 and Envy 6 are budget-oriented ultrathin devices which will come in official Ultrabook or AMD-based ‘Sleekbook’ flavors. The AMD options push the prices down even further by giving up on some of the Ultrabook feature requirements. Starting at $599 for the cheapest Sleekbook, or $699 for the cheapest Ultrabook, these are value-packed systems!