I rigged up a clamping system to push them onto the end of the control arm, but it didn't work. In the end, I slipped a large socket over the end once I got the bushing in part way, and tapped it with a hammer the rest of the way. If you don't understand what I mean, then you will once you take a closer look at the bushings. The trick is to get both of them on and the car back onto the ground withing 20min or so, but it's not that hard. The more lubricant you use, the easier the job goes.
The M3 bushings are stronger and will last longer since they're solid rubber. But I saved money and used the OEM ones and am happy with them.