Strangely enough, Mimberman and I had the exact same upgrade path. I had the Forests for about 6 months and upgraded to Dali Euphonia MS-4's.
I, like you, listen mostly to indie rock and heavily produced rock recordings. I truly enjoyed the forests, but one issue I had in my system was that the sibilance on some records (singers pronouncing the letter "s") actually got too hot for me. Once I started hearing it I just could not get around it.
The voicing of the Dali's is such that I have gotten rid of the sibilance problem, but without losing the detail, speed and transparency I enjoyed so much with the totems. Also, even though one of the Forest's strong suits is bass, especially for their size, moving to the larger Dali's has confirmed that there is no replacement for displacement. Bigger drivers and bigger cabinets are going to move more air.
The Forest is a fine speaker, but like Mimberman, I suggest you give serious consideration to Dali Helicon 400 MkII. JM Lab does make a great rock speaker as well. I auditioned the 1027's a while back and really, really liked them.