I have friends with the gizzmo IBC its not a bad unit but pretty hard to use.
I have the HKS EVC 5 thats one damn wicked boost controller but it also cost me $950 so not a cheap option at all.
The apexi AVC-R would be a very good option but still pricy.
but a cheaper option is the turbosmart duel stage manual boost controller are ment to be very good.
Also the go fast bits boost tap is also ment to be a good manual controller for under $100