The first and biggest thing that is wrong is that it has been done many times before and has become boring by now. The second, lesser thing is that all these devices are really very different in terms of experience and each has its problems. You choose the one you like based on what kind of problems you are ready to live with.
The most natural thing to do is to buy a device you like, then shut up. If you've accidentally bought a device you do not like, sell it, then go to step #1.
That would require me to get one of these devices and actively try crashing it, so no, no URLs for you today. As a rule of thumb, I suggest you try sites with a lot of CSS styling and JavaScript. However different these devices are, they all use similar web engines and have similar memory specs, so abundance of CSS/JavaScript should affect them similarly.