My Thiels (3.6's) through a very large deep soundstage and are not harsh or bright in any manner; not fatiguing in any way. I have simply not experienced what Jafox is describing. Are they detailed yes without a doubt this is another aspect I like about them. I hear everything the music has to offer. For electronics I have a Conrad Johnson Premier 16lsII and a CJ MF2500A power amp, of which I just sold, an SCD-1 for the front end and all Audioquest cabling Anaconda and Volcano. If your 6.0's are not giving you the dimensionality you are seeking then it is the electronics not the speakers. Just my opinion.
Chuck
Chuck