I love the Lumin line. I have had the U1 mini, D2, A1, and X-1. To be honest the D2 was the lowest SQ but it was to be expected at that price point. If there is any way you can stretch your budget and buy a used T2 or A1 you would be happier. I can say there was a major step between the D2 and A1 and a monster step up from A1 to X1.
