Are you sure ? There are the well-known Sony and TDK CD-Rs that work fine for most users and burners, actually.
That's right. Very many brands are sold under the Imation or Memorex brands, so it's nearly impossible to guess what brand you will be getting when you go buying your media.
I have to eject the CD-R to set the speed to any other setting, insert the CD-R and then click copy to get it to copy at any other speed.
If I set it to maximum, these CD-Rs ALWAYS fail during the burning process.
Ok, so Nero tells you max writing speed for that CD-R is 4x and you want to get a higher speed ? At your risk! What are you actually doing is (in my opinion) a trick to make Nero burn media that it rates at 4x-writeable at a higher speed. Assuming that you usually should never burn media at its maximum speed... guess what happens if you burn it at a higher one! (This does not apply to any media; for example, I have had good writing results with Verbatim 48x media burned at 52x).
I think the smartest solution is: buy other media.