Well it's upgrade time ! have been holding off for a while now but it's all getting too much. Can get the 300 for £930 and the 500 for £1200. Question is which one ? On the face of it I would go for the 500 if the improvement over the 100 is immense. If it isn't that significant an improvement then maybe go for the 300. I did have my eye on the Sony 12HT when they were on offer at Play, but alas that is gone now. Any comments from AE100 owners who have gone this route ? I have to say I am still more than happy with my 100, it has served me well.