I yet have a Perfect Grade Gundam Model at all. I really do like Wing Custom but I have heard a lot of bad things about the first one and the second one is the one to get. Also the second one, Pearl Coated version) is like $250 or more which is a ton more then the first version. Plus I think I might get OO Riaser. Anyways, the most recent release that is coming is the Freedom Gundam which is shown below.
It is supposed to be the biggest PG in volume with the Dragoon extended.
Check it out at Bandai's official site.