The HiFiMAN Sundara is the name of the wildly successful HE-400i which set the bar in terms of sound quality for entry-level planar magnetic headphones. The Sundara is roughly the same form factor, but a lot has happened on the design front. The Sundara features a new headband, new cup, and new pads, which are more in line with their higher-end offerings.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips