upgrade to mod con question

pat_3

existing heating system is aprox 1/3  recessed cast iron rads [not oversized], 1/3 low temp high mass radiant and 1/3 higher temp low mass radiant.system also has two 56gallon dhw storage tanks.the system has two injection pumps for the radiant sides of the system controlled by two tekmar 356's.my question is do i basically leave the controls and injection pumps intact and just set the new boiler to modulate and not condense or do i take out the injection pumps and try and set the boiler up so it will condense at least some of the time?or is there another way i should be setting this up? i have no experience using a mod / con in this type of multiple temperture application ,any input is greatly appreciated.