I was actually pleasantly surprised when I checked out the new tool from fonnybone today. I got some engineconfigurations that really sounded great! In general I feel like the sound engine sounds much better at low revs than at high revs.
But trying these configurations gave me hope that lfs indeed has the potential to blow everything else away, soundwise.
As said above, the next big thing on the list should be ambient noises, and other in car sounds, especially gearwhine.
all in all, this is definately the way to go. multisample engines like gtr and gtl sound good, but they are at their absolute peak. it doesn´t get any better than gtl. and now compare a real life cobra to the gtl one. it sound like it perhaps, but it doesn´t feel like it.
lfs and netkars approach is definately the way to go