Here's an update to my questions regarding which 4-post lift to choose. Thanks everyone for your assistance in helping me.
Proximity to distributor and installation, ALI certification, and service should any problems arise were factors that I felt important. Searched around and lo and behold, found a distributor for VSG lifts quite near to where I live. VSG includes Rotary/Forward/Direct lifts and is owned as mentioned previously by Dover Corp. Forward incorporates many of the features, engineering utilized in the Rotary brand, which is more hard core, and their EFP9 model would accommodate the 911s and GT well. Color choice is black, black or black but this is okay as this is what the GT, 911s are. There's a 3-4 month lead time in arrival from their plant in Indiana. Anyway, this is the direction I'm heading in and am eager to get this garage pulled together.