We've found that the best system is the one that still uses paper strips!! Granted that's not going to be an option for you but you'll be amazed at all the things you'll find you can't do easily that you used to do easily. Our system (Nav Canada) works after a fashion with IFR traffic but when you introduce VFR traffic of any description (overflights, free calls, circuits etc.) or non standard IFR/VFR it seems to sulk! At least, that's my unit's experience in the UK.
