Personally I haven't seen a huge improvement with the flamethrower coil, you may be better off putting the extra bucks towards a real Mexican 205S in place of the Chinese ones most of those "kits" include. Even better if you get John at Aircooled.net to tweak it specifically for your engine, carb and car first.
No doubt others will have different opinions but that's been my experience.
An 009 can work fairly well if everything else is 100% but you will notice the improvement with the SVDA.