I wish there was some perk-like Achievement:Hardcore completion awards (like better sight, faster travel timer or such), stuff linked to achievements alone...  For example, it could be something like: "You've completed flighty felon Hardcore, your Felony timer resets to 5 minutes instead of 8 as long as your travel timers running..." or "flight reduced by 5% for completing [Drug dealer achievement] Hardcore."

The Cash and exp is nice, but this could boost the importance of completing achievements and really make it more rewarding to complete the Hardcore achievements.

I like this idea. It'd make it worth it on top of the nice XP and cash bonus it'd be something to strive for more than that and boredom :) 

I too, do like the sound of this idea. It will definitely add more importance to the achievements. They are very time consuming, so it would be nice to get a little bonus next to the xp/cash/credits.

Good idea :)

i like this idea alot, i would like to add that the perk rewards should be unique and useful but not regiftable to really encourage them to be achieved

Yep I like this too and agree not regiftable. Nice additional reward for those that plough through each especially the hardcore ones. +1

Oh, I wouldn't even have it be something you activate. Soon as you go to the achievement page (If not soon as you finish it), it goes active. definitely not regiftable, or transferable.

on top of that, because achievements reset when your account resets, so do the rewarded perks.

+1, definitely could be another incentive to get the hardcore achievements done!