Paul: I've been shooting a DAS bow since they came out. 3Rivers sells all the hardware you need to convert ILF to DAS bushings and they have the instructions on how to do it, as well.
As for limbs, most ILF limbs are shorts, mediums or longs. On your riser you will get 58",60" or 62" bow length depending on the limbs you get. If you get a set of ILF limbs they will be weighed for a 66" bow if I am correct. In any event, whatever limb you use, short, long or medium, you will get about 10# more on the DAS riser so you need to be looking for ILF limbs that are 40-42# on a regular target riser. You could get a set of Hoyt G3 limbs or if you want a set of custom limbs contact Bob Morrison or Border Archery in Scotland. Bob or Sid can make your limbs at the length and finished weight that you want. You could also contact Sky Archery as they are now up and running and they can make you a nice set of limbs as well. Fortunately, the ILF limb "thing" has caught on and the competition for making the limbs is getting better and we have more choices than just two years ago.
Good luck and have fun with the new bow. "High performance" is in your future.