I both these shoes thinking they would be similar to my ASICS 2150 road shoes.  These shoes are a little stiffer and tougher material then the 2150 ASICS road shoes so you might what to break them in for awhile before running a major trail race. These shoes adsorb shock good and breath good and are light weight.  If you run with the 2150 or any 21xx series road and switch to trail running you might like the GT21XX series.  Just try them out first in a store and make sure they aren't to stiff.  They will be a little stiffer then the road shoes and will take some time to get used to.