In the late 90s, MC approached Rob Shirley about coming back and designing a boat for them. As many of you know, the late 90's MC's did not have a great reputation. Well, Rob came back with some pretty outside the box ideas....but MC decided they weren't going to produce them.
So, Rob came back in the boat business in 2000 with the first Infinity ZX-1. The basis of design was pretty simple. A rear mounted gas tank is similar to a ballast tank in a wakeboard boat.....lots of weight in the back pressing the hull into the water. The idea was to move that tank to a more central location in the hull....hopefully to help reduce the size of the wakes. However, to achieve this, the engine had to be pushed towards the rear of the boat to make room for the fuel cell. With a traditional direct drive set up, this wasn't feasible. However, you slap a center mounted V-drive in there....and voila! Now you have a boat with AMAZING handling and acceleration....not to mention TONS of interior room.
The ZX-1 was truly an outside the box desing and had lots of great features on it. There were complaints about the 22 off bump (it was very dense and hard)....but shorter than that and it was great. Due to the V-drive, the angle of the prop shaft was not as steep as a direct drive. This resulted in more direct thrust towards the rear vs the competition. This made the ZX-1 one of the fastest 0-36 mph boats on the market. This also gave the boat that "strong" pull that some of the others referred to. Many jumpers loved the Infinity b/c of that extra strength.
I believe the factory caught on fire and most was lost. The molds and design were sold to the Canadian company Svfara. The ZX-1 is now the SV-1....I'm not sure if it's still manufactured.
Overall, the Infinity was an excellent boat. If you're a short line skier, I think it would be great. But do remember that Infinity is no longer in business....I don't know if Svfara is still servicing or producing replacement parts for them or not.