the SPI 028 unit for re-mapping the car, it kindo makes sense to be able to re-map as i make alterations, e.g, ill re-map but will shortly be putting a kit together (fuel pressure reg, new injectors etc) for a 2.4 manifold conversion then cams etc, and may want to remap at later date.
plus i think you can never learn enuf(and if your mates chuck you a few quid to do thiers it can only be a bonus i have a friend up in darby uni who can show me the ropes)