If your images are fine, and you are just doing photography as a hobby, then stick with what works. Gitzo is for serious photographers who need reliable equipment that will do the job when they ask it to, and its priced accordingly. There are other less costly brands with heavy duty legs that may not be as reliable, but work well. Manfroto makes high quality legs at a fair price, but not $100.
The head is probably more important than the legs, don't skimp there. Where the legs suddenly become critical is with long exposures. If you hang your camera bag with equipment from the under hook of your tripod legs to stabilize it, you should be fine.
The Manfroto combined head and legs like Costco sells, for example, are of pretty limited use. The first time a little gust of wind blows over a 5D MK III and 70-200mm lens, the repair bill will set you back many times the cost of a good tripod with underhook, but if you are aware of the risk and take precautions, you can make do with most anything.
The other thing is that eventually, you will want to go to Arca Swiss type Quick Release plates. Manfrotto has finally indicated that they will make them. They are very universal among pro's, there are so many weaknesses in the RC2 plate system.
So, first buy a high quality head with AS type QR plate ($500 and up), then consider good legs. If you already have a good head, you will soon recognize that the weakest point is now the tripod legs.
Be sure to get a tripod that sits tall enough for you to look thru the camera viewfinder without any cranking up of a center column. Better to bend over than crank up that column.
Here is a example of reasonably priced legs from Manfroto. They have 4 section ones as well for a few dollars more.
Check that the height is adequate for you, some of these might require you to get down on your knees. 48 inches with center column down is just too low. This Manfroto falls in that category.http://www.amazon.com/Manfrotto-190CXPRO3-3-Section-Carbon-without/dp/B0015MFTE4/ref=sr_1_5?s=photo&ie=UTF8&qid=1372691654&sr=1-5&keywords=tripod
Vanguard makes good ones as well as cheap ones.http://www.amazon.com/Manfrotto-190CXPRO3-3-Section-Carbon-without/dp/B0015MFTE4/ref=sr_1_5?s=photo&ie=UTF8&qid=1372691654&sr=1-5&keywords=tripod
Induro also makes some good ones and some not so good. Watch out, $200 for a 49 inch high tripod is wasting your money unless you are pretty short. Get one that is over 60 inches or even 70 inches so you can set it up on a slope. http://www.amazon.com/Induro-CT313-Section-Extends-Supports/dp/B002VUJM2Y/ref=sr_1_11?s=photo&ie=UTF8&qid=1372692034&sr=1-11&keywords=tripod
For me, the Gitzo traveler is not quite tall enough at 58 inches. Even adding 6 -7 inches for a head-camera combination, I'm 6"2 and my eye is about 69 inches-70 inches above the terrain. If you are six feet tall or less, its fine.http://www.amazon.com/Gitzo-GT2542T-Traveler-Tripod-Black/dp/B009DP5RV0/ref=sr_1_4?s=photo&ie=UTF8&qid=1372692197&sr=1-4&keywords=tripod