I highly recommend...

repainting your Leader Megatron, if you have one.
Seriously, you don't have to make him on par with the standard of Jin Saotome. In fact my own repaint, compared to a lot of the ones I've seen on these forums and on Jin's website, is pretty poo. But since repainting him he has become my favourite figure (which isn't saying much, since my collection consists of only 15 toys). Out of 10, my Prime is probably 9.5 and repainted Megatron is 9.6 or 9.7. His robot mode becomes so much more worthwhile and he also becomes a much better display piece.
Seriously, you don't have to make him on par with the standard of Jin Saotome. In fact my own repaint, compared to a lot of the ones I've seen on these forums and on Jin's website, is pretty poo. But since repainting him he has become my favourite figure (which isn't saying much, since my collection consists of only 15 toys). Out of 10, my Prime is probably 9.5 and repainted Megatron is 9.6 or 9.7. His robot mode becomes so much more worthwhile and he also becomes a much better display piece.