although it sucks being able to only get some of the funky armour and stuff when you've literally 100%'d the game and new game plus quickly makes it obsolete so maybe doing it first is a good shout.
Ah yes, been stitched up by this before, defeating that final guy and getting the MegaUltraKiller weapon and realising you've just killed the only guy that warrants using the thing
although it sucks being able to only get some of the funky armour and stuff when you've literally 100%'d the game and new game plus quickly makes it obsolete so maybe doing it first is a good shout.