I think that a good pink will suffer from the same problem as all other intense hair colours, namely UV fading and fading from washing. When I dyed my (white) hair purple it really stayed intense for a while, then went through the long fade. Ditto when it was dyed a conventional brunette - always ended up kinda ginger after about two weeks.
I don't know of a permanent one but I find Special Effects to be one of the better semis closely followed by Directions. You can find them here. http://www.beeunique....4003538d43d5fc0ac6daa
I have tried different brands of usually pinks, purples and reds on bleached highlighted hair. I redo mine between 2-4 weeks depending on how much it fades and wether I like the colour it fades to.