Might be better to consider what makes people close to you can deal with mapping wise, and what features you want from a ecu, don't pay just because it may have a big name, and loads of features you may never use.
As for loom I can get you a custom loom made at a very reasonable cost, just pm me some contact info, and I'll pass them on, I get nothing out of this by the way just helps peeps out.
Personally I use a emerald K3 on my cossie sapph, but just taken the engine out as done 200,937 miles so due a rebuild!!, prior to this after being mapped 40mpg was no problem with emissions ace, 0.97% co @idle, with 137ppm, best thing by far you can do imo.
tabetha