Go the PFC or any other stand alone
R33 Ecus really do not like the Emanage (from experience) the standard ECU has too many protection features.
Here are some NEW options available to you
http://adaptronic.com.au/products.html?page=shop.product_details&flypage=flypage.tpl&product_id=67&category_id=1
http://wolfems.cart.net.au/details/696060.html
http://www.vi-pec.com/page_files/pluginecu.htm
But for ease of use (ala plug it in and drive the pfc is great)
but note, despite the Wolf, Vi-Pec and the Adaptronic being more expensive, you wont have to buy a Z32 AFM when you want more power as they are map based ECUs
They also all have inbuilt boost control, just need to buy a solenoid and wire it up. they can also control extra fuel pumps, thermo fans, Nitrous, support data logging, trac control multiple temp based rev limits pretty much anything you want.
The PFC will not run any extra things, so if you want any of the above you have to either get additional controllers etc
the Wolf and the Adpatronic can run flex fuel sensors if you want to go E85 or PULP or anything in between.
ESP are Vi-Pec dealers, and they go for around 1600-1700 + tune
Something to think about