I own two SV Infinitys, and will be acquiring more. They are my favorite handguns bar none, and neither has ever let me down.
They are mainly marketed toward competitive shooters, specifically USPSA/IPSC shooters, so that's why the average Joe has no idea who or what they are. You can go over to http://www.brianenos.com where there is a community of competitors who are intimately familiar with them.
I don't know exactly which model you own, but I feel fairly confident that it would cost at least $2500 if you were to buy it today.
Strayer-Voigt don't have a standard lineup of off-the-shelf models (STI does as I will mention later). Every gun they make is to custom order. That's why they have the Gunbuilder program. They are a small shop more interested in pushing the envelope of what a 1911 can be, than selling as many guns they possibly can to all segments of the handgun market. As a result, they focus more heavily than most on innovation, having developed the interchangeable breechface, Tri-Glide trigger system, interchangeable trigger shoes, the Tiki design, and more. Every part is supposedly CNC machined out of billet and hand fit.
STI is a separate company that builds guns on the same wide-body frame that Virgil Tripp and Sandy Strayer both helped develop, along with Chip McCormick. Basically Strayer and Tripp went their separate ways, forming the respective companies. STI is more of a mass producer of these guns, so their guns don't get as much hand work as SV's, and they tend to use less costly components in their guns. They are still quality handguns though some need tweaking out of the box to be fully reliable.
The widebody STI/SV design, while disdained by 1911 purists, has proven itself in over a decade of high-round-count competition. They are currently the platform of choice for most top competitors, and can withstand an insane round count. It's common for them to go well over 100,000 rounds.
Personally, I love the Strayer-Voigt style and think the guns are exceptional in quality and design. I compete in USPSA Limited division with my two .40 caliber Infinitys, but that's more because I want to shoot the heck out of the guns I love, than any real love for the game. I also have a bushing barrel that I drop into my short dust cover Infinity so that I can compete in IDPA with it. If somebody stole my Infinitys and I had to shoot matches with an STI or a Glock, I probably wouldn't bother... for me, it's all about the guns first and the game second.
Hope this helped!