GPGPU Programming

I want to get into GPGPU programming out of curiosity.

CUDA or OpenCL? How do I choose which GPU to buy?

How to enjoy OpenCL in 14 steps.
1.buy tons of expensive books about GPGPU programming. They're all outdated but they'll work.
2.buy 1000$ graphics card.
3.Overclock it.
4.Copy algorithms from the internet, slightly modify them.
5.design your own algorithms.
6.create your own OpenCL library of algorithms. Open Source it.
7.Write a project using your library. Open Source it.
8.Wait so alot of people use your OpenCL library.
9....5 years...
10.Graphics cards advance to support newer standards, newer hardware, making your library obsolete.
11.Your 1000$ graphics card is now worth 10$ at best.
12.Your algorithms now rely on legacy features and half of them are deprecated.
13.You cry yourself to sleep and swear off GPGPU programming for good.
14.People write really awesome GPGPU code and you get jealous. Proceed to step 1.