Really liked how our LS performed. Prefer the sound of the SBC's and a BBC I owned though. Liked 'em all enough to put in a Tri-Five and/or a Camaro. Now looking at the LT-5 alternative; unique sound, looks great and less filling...up.
I've seen used ones go for $6K and under recently. Pretty good value IMO for a very low volume hand assembled blueprinted motor that helped set a number of endurance racing records at the time (March 1990) with a stock motor. For those interested its quite a story.
http://www.zr1netregistry.com/WRR.htm
I believe this is the biggest one out there at 440 cid. He's driven it long distances in addition to racing it (below).