2.5k is a bit on the high side!
for adaptronic that mine runs, or EMU that Sonic Boom runs, you are looking at 650-700 for the ecu, then build the loom yourself or pay someone a few hundred to wire it up.
then the actual mapping will probably be cheaper than using MSD/NMS/turbosystems. Certainly no more expensive.

For that you get reliability and driveability from a new loom and modern control system, and you get all the extras for free, like Wasted Spark, closed loop, launch control, antilag etc. that you have to pay extra for with old weber stuff.
Also, you aren't limited to old cossie sensors that are in short supply, (3 bar map for example) so it becomes cheaper again. And you can run pretty much any injector you want so long as it physically fits. so you aren't waiting for ages for a set of Siemens 83lbs to come up and paying over the odds fror them.

When you look past the initial work/outlay, it really does make a lot of sense. Whish I'd of done it sooner.