Some random thoughts:
Stick vs. yoke--a non-issue. I learned with yokes, took maybe 3 1/2 minutes to transition to a stick. Back and forth on the same day soon made no difference.
Certified vs. experimental--unless you built it, you still have to have it "annualed" (it's called a condition inspection, I think) by a certificated mechanic. There is a significant price difference for non-TSO'd items, such as avionics, though. But you can't just DIY.
Wait until you've got some time under your belt. Although you have some aviation experience with the hang gliders, you may not have enough yet to know if you'll stick with it. A $30K airplane can be a millstone if it's just sitting at a tie-down or in a hangar and not being flown, either because you've lost interest or because it doesn't fit your actual mission.
And that's the real question: are you really all that sure what you'll want to be able to do with it after you get your private certificate? Many students have warped ideas of their "ideal airplane", until after they have some time and have the opportunity to fly several different airplanes. The aviation economy is still marginal, so you don't want to be stuck with something that doesn't fit your mission. Early in your training, it's hard to know what your mission really will be.
I know it sounds like heresy to say it here, but sometimes people who think they'll want a back country capable airplane find that they never use it. It can be like guy who buys the jacked up SUV with the 10,000 lb. winch on the bumper that never leaves the pavement. They find that they don't have the skills, or the desire to learn the skills, to get into the back country. And some, like me, find that they can do just what they want to, with an airplane that is far from perfect for the back country but still lets them get into a few of the "easier" places.
Over the years, missions change, too. Two-up works great for a single or a couple, but it doesn't carry much extra--there are exceptions. A 4-place flown as a 2-place provides lots of room for stuff, dog, etc. and often has better performance than a 2-place.
My first airplane was a 182 in partnership--great airplane, fit our mission perfectly at the time, as both Wife 1 and I enjoyed flying, we had 2 kids and a large dog, and we could go wherever we wanted in it. Over the course of the partnership, we moved on to a TR182 (faster, not better, than a straight 182, and much more capable at high altitudes) and then to a T210--a truly great airplane which is fast, hauls a humongous load, and is not fun to fly and costs a mint to operate if all you're doing is hauling yourself and one other.
Now my SO doesn't like to fly, my kids have been grown and gone for 25 years, I usually fly solo or with a buddy and my dog, and so my hot rod P172D fills the bill perfectly for me. I can get into the mountains, land on reasonable strips, travel leisurely, go IFR if I choose, go long distances if I don't mind taking awhile, etc.
So my strongest advice is to wait awhile until you're more sure of what you'll want the airplane to be able to do. Owning any airplane, certificated or experimental, is expensive, and while you're learning, often it's less expensive to rent. You'll rarely come out ahead to own. If you do happen to hit the right one, great. But don't be in too much of a hurry.
Cary