If you don't have a gaming PC that's ready for the Oculus Rift and were in the market for a new PC, you can now pre-order Oculus Rift PC bundles right now - with the PCs starting at $1499.
The ASUS G11CD-B11 bundle sports an Intel Core i5-6400, 8GB of RAM and an NVIDIA GeForce GTX 970 for $1499. The recommended specs for the Oculus Rift are an Intel Core i5-4590 or better, 8GB of RAM minimum, and a GTX 970 or R9 290. The entry-level VR gaming PC from ASUS barely makes it, but hey - it'll be fine for $1499.
Moving from there, we have the Alienware Area 51 which costs $3149, featuring an Intel Core i7-5820K, 16GB of RAM and an NVIDIA GeForce GTX 980. Alienware's Area 51 gaming PC also includes a 128GB SSD and 2TB mechanical HDD. Remember that each of the Oculus Rift ready VR gaming PCs includes an Oculus Rift headset, sensor, remote, an Xbox One controller, and the two games included by Oculus: Lucky's Tale and EVE: Valkyrie Founder's Pack.
You could also build your own PC, and this is something we'll be looking at in the coming weeks and months - with some VR gaming build logs on their way.