I have the medium - I can show it to you on Thursday. You're much thinner than I, but probably have longer arms. But I think ibex sizing if fairly normal.

Grog,

I'm not sure whether or not you can get away with knit wool pants as business casual attire - but I have the loose tights & the izzi pants and like them both...

Then they have the more softshell like pants- the alpstar.