Both thermal paste and thermal pads have their advantages. As system integrators we found that Indium pads produce (very slightly, to the point of "meh" unless you go for every single degree C) worse thermal results and are harder to handle (gloves and razor blade required to remove the pad if you want to re-use and it's still fiddly).
For someone who only assembles their computer once and then forgets about it, thermal pads are fine. The same goes for thermal paste.
If you want to go with thermal pads we found that the brand shouldn't matter as long as the product is targeted towards CPU cooling. Because of the high pressure system the pads become heavily compressed, more than with known x86 sockets, so that thermal conductivity or thickness didn't make a difference worth mentioning for the small selection of pads we've tested (IIRC RCS's brand and Arctic Performance)
I'd recommend using thermal paste (or pads) on all CPUs, including the 4c, because the CPU will run cooler and more quiet under load.
I'm aware of the RCS wiki disagreeing with most of the above.
