I would wait until HDMI 2.0 is released later in the year. There is no 4K 3D. You can have 4K or 3D you can not have them both. In 2D, if by content or up conversion you get 4K. In 3D you get 1080P 60 refresh rate per eye or 120, unless you have the newer 3D that offers 144 or 240 refresh rate. So to make it simple, in 2D you get 4K. In 3D you get 1080P. And before others try to post more technical meaningless information, 1080P in each eye does not equal 4K. It equals 1080P.
HDMI version 1.4 nor 1.4a supports 4K 3D. HDMI 2.0 will support this and the higher 144 and 240 refresh rates.
I never said 4K 3D was impossible, the component limits prevent it. Theaters are just now getting to 4K 3D projectors thinks the Laser projection, that can technically project a 8K image if such a beast was made.