All the cool kids are building an LSx.
I, however, am a geek.
Seriously though, I just prefer the look of the traditional pre-LSx engines more, as a personal preference for my current project. I'm sure I will do one sooner or later...
Going LSx is getting easier by the day, and that can only help the industry and the hobby. The aftermarket induction options are really just starting to get rolling for LSx, we are in for some really exciting stuff in the months/years to come. Being (relatively) plug-and-play already has a LOT of people going LSx who probably would not have attempted modernizing a traditional pre-LSx engine with EFI, etc....Just my $.02 -Rob