I went for cossie for the following reasons.

1) it can be mapped by a large number of tuners which gives you many more options.
2) Due to reason number 1 the parts have a high second hand value which ensures that should you break the car you can recover most of the cost.
3) The parts will sell easily second hand as cossie and CVH turbo owners will be interested

Have you seen how much a L8 with pectel board is still worth ?
What about pectel monitors they still are worth decent money second hand ?
-- This suggests the parts are still in heavy demand.

Cossie may not be the cheapest solution out of the box, but it is a proven performer and probably the management system that devalues the least and is the easiest to sell on.