Hi D. !
i'm not fan of the IB2 personnaly i had them here for about 2 years with hypex amps.
they have something weird in the bass with the transmission line it's very flatering, and a bit difficult to know where it's really right. and the thing to have the mids at 11° up the ears to have them aligned is weird.
i had some smc 150 on loan for a month great mids, that's a fact ! but the basses were too much for my room so i kept my
http://www.klinger-favre.com/ studio 15 wich were still more accurate in the mids and high.
i know they'll start to have a representative in US as Jean Jacques Bacquet who build those speakers (one by one by hand ) did a few accoustic works in NY. and he's developing a new model for the US wich is a bit up my studio 15 maybe it's worth a listen.
with the time the only default i found to those speakers is a bit of lack of extreme subs and the level of details is a bit disapointing sometimes and very hard on average mixes.