I have dealt with PSX before and I found them very good to deal with. Their communication was very good and the item arrived quickly. Postage was reasonable compared with the other overseas shops.
If you are after Feral Rex and can wait I would go to TFidu. After the OS postage costs they usually end up line ball or cheaper than the OS shops but they are not stocking it for a while. I am waiting for Leo Dux because I missed it first time around.