I have two 30" lcd monitors. They are both dual link dvi input... I want to use both with a 27" iMac... the only dongles that I can find seem to have a big bulky dongle along requiring the use of usb and the thunderbolt port. Is there any solution that only uses the thunderbolt port? Thank you. http://www.monoprice.com/products/p...=10428&cs_id=1042802&p_id=6904&seq=1&format=2 This is an example of the only adapters I can find. Thanks.