You won't regret it. You won't regret Gitzo either unless you got a lemon. Thinking of the extra charge as insurance and better material/workmanship.
If you're a super-heavy-duty professional then I guess it won't make much difference - you'll wear out your tripod in 5 years let it be RRS or Gitzo - then the price saving make sense as long as you don't get a lemon.
I believe all the tripods in at the cost of RRS or Gitzo are similar, with minor differences. I was ok with my Gitzo 5561, three things got me to switch - weight (7.5 lbs), worrying about the head disconnecting with my camera on it and having to learn another language to communicate with the manufacturer. I moved to the RRS 34L, weight (4.5 lbs), locked head and if I want to talk to them I call California. I have no complaints, I haven't bothered digging out the receipts, but I believe the RRS tripod cost less than I paid for the Gitzo.