135L is a very inspiring lens. The IQ is also superb. I just love this lens. However, in your situation I would postpone buying 135L. Instead I would sell 50 1.8 and get 35L. This is another lens from the trinity and it is also magical in every respect. However, the 35L might be (I'm sure will be) in use a lot more often than 135L, especially while travelling. You will get 135L down the road, this is a "must have" lens for Canon system, but right now I think you will benefit a lot more from a 35L. I just think with your 85 1.8 and a crop body you already have your portrait fl covered. For travel i would take with me 35L and 70-200. This will give you good coverage and IQ.