My heaven would be locked inside Aperture Science Inc. with my very own personal relaxation vault. I'd have a computer that is so future proof, GLaDOS wouldn't be able to overcome it. Carpal Tunnel Syndrome would be completely prevented and cured, I'd have a direct link-up with any game I wanted with any system I want. A huge HDTV on the wall and an epic sound system to accompany it. With this nifty little thermostat-like device on the wall, I could punch in the numbers to open a portal to any room of Aperture Science, each of which is stocked with an infinite variety and amount of things. The DEMO-video version of Wheatly would be my own personal companion sphere, since THAT version of Wheatly has an awesome voice that already fucking fits. GLaDOS would also be my audio-command device to download or upload anything, or even to change things around. And I would live forever.
Also, my boyfriend would be there with all the same luxuries ^____^