1 thing I will say to the OP tho, if you are considering getting a ps4 and you have a ps3/vita atm make sure each month you have psn+ you go to the psn store either online or on the ps3 and add the licences to your IGC for the ps4 offerings each month, been doing that for a while now, means when I pick up a ps4 I have a huge pool of games to dive into.
As for Psn+ not being value for money... Vita got 5 games this month, for less than €5 I really can't complain, I've already lost about 10 hours into Steamdig world, absolutely fantastic game that I would not have purchased if not for psn+ giving it to me and also I am really bad at actually finding the motivation to play the games I have, just leave them on the shelf knowing they are there if I find the will to play them years down the line, with psn+ you can use the "rental" type time limit (which being honest I can't see a reason I would ever allow to expire) as incentive to actually play some games which are offered up.