My bias is toward the system touted by the last manufacturer brochure I've read. /w3tcompact/icons/wink.gif
Seriously, though, every manufacturer says theirs is the best and they all seem to work well. Direct injection should theoretically be more efficient, so I generally prefer it, but there are supposedly ways to compensate for this with various forms of indirect injection, though I think these generally involve computer control. Indirect injection engines are usually quieter, unless computer control is used on the direct injection engine to compensate for that. (I like the sound of direct injection, personally.) And so it goes ad infitum, ad nauseum. Generally speaking, though, direct injection is considered best for getting the most bang for your buck, pardon the pun. If you live in an extremely cold climate, indirect injection engines can sometimes be easier to start, but I think this advantage has been minimized by the usage of extremely "hot" glow plugs.
Still, all in all, you might be better off using other criteria to make your decision. Like what you favorite color is, etc... /w3tcompact/icons/smile.gif
Mark