You really need to do some research, the only thing that may be accurate is the vipec, check the for sale section, pfc $1000-$1200 z32 $100-$200 ebc he already has one, pfc tuners, everywhere, vipec tuners, limited.
And looking at his mods he does not need a z32 or all the extra gadgetry that is on a vipec, not to mention the fact that he didnt even ask for info on a full ecu so you are recommending a $2000 ecu over a $1500 ecu when he asking about a $500 piggy back.
As for the nistune if you actually do your research you will find that the 33 ecu can be done but will cost over $1000 to do it coz it is a headache, other options for a 33 is to use a 32 and rewire the loom, vct will not work with a 32 ecu either, or mod a 300zx ecu and rewire the loom to suit, hence why using nistune on a 33 is not really the great option it is for a 32, and i didnt say it would be more expensive i said it would be about the same price.