A pair of cams + slide pulley gears is not too expensive.
Maybe $900 for the cams, $350 for the gears.
You can even keep your NVCS VCT with the Tomei set (not sure about HKS).
However for your $1,250 (say $1,500 to install)...
It is giving you $1,500 worth of power?
I suspect not.
T.