What are you looking for in a cabinet? There are many different products out there, we for example carry the Slide-Lok and Coleman products which we use in many installations. Personally I prefer the Slide-Lok ones of the 2, but the Coleman are cheaper which is also a benefit. (you can see some examples on our site
www.TotalGarage.ca)
There really aren't any "modular" cabinets out there that you can throw a significant transmission into, at least not one off any older car, perhaps a newer one as they are generally rated for 2-300 lbs.
Tell me what your looking for and I can try to suggest some options that might work for you. Now as mentioned above by another poster, I also like the custom cabinets, these will fit your garage perfectly, BUT they will come at a higher price then the modular ones but they will be solid!
I would suggest only looking at products that are elevated from the ground, as water will damage the cabinets in no time. If your going with modular, make sure they are solid. Most will be solid when mounted to the wall, but if they are solid before hand they will last longer. Also wit modular, make sure they will work as you want them to, they don't always work like you might think they should.
So thats my initial 2 cents...
Cheers,
Quentin
www.TotalGarage.ca