most applicable candidate for diesel swap?

[cstanley]

anyone have any good ideas/knowlege/experience for the "best" diesel swap? i'm currently weiging my options. i've been planning on a drive train swap using '06 5.3/lt60E with DOD, but i've been rethinking this in light of a diesel option.

so, anyone have any idea what the best candidate might be? i've heard mention of a few different engines, but i'd like to revisit the thought.

the goal:
1) i'd like to eventually run it on biodiesel or biodiesel blend, so it needs to be a newer engine (i've dug up in research.) i'd also like it to be a quiet engine, not a rattletrap of a diesel.

2) most pain free swap (if there is such a thing.) this includes mating to a proper automatic transmission, engine mounts, computer, etc.

also, discuss the economy of the swap. are diesel engines more expensive to come up with? swap expense? even if i run it on regular diesel (barring any wierd bio hiccups, etc.) is it practical?

thanks everyone!