hello everyone, i just wanted some opinions on where i should place my 2 definitive technology's supercube I subwoofers??

Usually a corner placement is best, but there are MANY factors that will determine the best location for a sub, and the best location will vary greatly from room to room. Best thing would be to start reading the material at the link below. There is an artcle there dealing with dual subs as well.

http://www.audioholics.com/tweaks/get-good-bass/