Since I have numerously gone through the experience of shopping for tripods and have seen others do the same, let me tell you what many photographers end up doing. They first look for the cheapest tripod available that will be good enough to hold the first DSLR, since they have no idea if they really need it or do not know how often they would be using it. The tripod would cost between $75 and $150 for legs and head, which is a good price for a simple tool. Next, they purchase a longer and heavier lens and add more weight to the setup. All of a sudden, they find that the cheap tripod is not good enough and they need something more durable and stable.
After making the first mistake, they suddenly realize that they need to do more research and they spend countless hours reading about tripods on different websites and forums. Despite all recommendations from the pros, they are not willing to invest on a top-of-the-line tripod with a good ball-head, so they end up getting a popular tripod system for $300-500 with a separate head. Seems like a great investment and the tripod seems to be much better than the previous one. After a year or two they realize that their last purchase was not that good, because the tripod is too heavy and hard to use, especially for traveling. They realize that they should have listened to the pros in the beginning and bought a good tripod system. Does this sound familiar? It certainly does for me, because I went through a similar experience and wasted too much effort and money.
Other photographers might have a different story, where they purchased an inexpensive tripod they like in the beginning and they are still happily using it today. All it says about them, is that they are not using their tripods as much and what they have is good enough for occasional use. Anybody who heavily relies on a tripod (especially landscape and architectural photographers) ends up buying two to three different tripods to eventually end up with the best.