First of all, I have had a hard time getting my hands on Nelson for a couple of years now, so you are a lucky man if you've been able to score some.
Second, the best IPA I've ever brewed used a blend of Nelson, Meridian, Citra, Motueka and Apollo. The Apollo from that harvest was really orangey, so you could probably swap Amarillo in for that, and the Motueka was a bit overpowered, so you could probably drop that altogether. The combo of grapefruit/muscat from Nelson, stonefruit from Meridian, and mango from Citra is killer in fruity IPA's.