Seems these guys are the top two in the industry and I'm trying to decide which system to go with. Here is what I'm looking to accomplish with my purchase: Sharpen my estimating skills, pick up some ideas that I can use in the business, and any other learning I can require. Both have numerous books and software to purchase and they can get kind of pricey. I'm looking for someone with some experience with one or the other or both. I've found a lot of posts about VK most good with some critical. Only a few from Huston but they were all good. Any insight?