If you only have 3" cat back then I suggest you do the front + dump before anything else.
Besides that, you can try a wastegate actuator off a RB20 turbo and put in a SAFC or emanage and install a 34 stock cooler.
update: the supplier I was going to buy from only wished to sell the board if I bought his tuning data with EVERY board. Which pushed the price to over $300/board.
So now I have ordered a board from www.grid.co.jp and hopefully can have it installed before December.
Ed
After reading this and seeing the valvoline filter allows finer particles through, I am thinking if it is the cause of my oil pressure sensors playing up all the time getting clogged?
Where did you get the pureone filter from joel? autobarn?
Valvoline ones I buy from Supercheap. They are under $10.
After reading that link your posted Joel, I might switch over to the cooper's.
I wonder how much & well the nissan ones are.