I need a wide soundstage and bass impact.
GR07 probably won't satisfy your wide soundstage request, it has a very 2D soundstage, also it has a balanced bass impact, with extended sub-bass. Of the phones you have there perhaps XBA-4 is what you are looking for.
I love my GR07's but they do not sound like what you are looking for, although actually i wouldn't be surprised if you were happy with them in the end.
Best overall? There are huge differences in price which should be taken into account, but my vote is for GR07, i am sure many will sigh....
I have a the gr 07 and xba-3. Sound stage on the gr07 is truthfully better, but the seperation on the xba3 is a LOT better. It feels like xba 3 has layers of sound while the gr 07 has only one. The sound stage isnt as good so everything sounds a little in ur face.