I've gone through this three-step dialectic process:
1. In most places (but not all) the symbol of a currency is written before the numerical value. We should stick with this convention: $6,013.44, BTC40,049.5104.
2. Bitcoin is new and different, and we have no reason to perpetuate the weirdness of the old school. Outside of the realm of economics, units are written after the numerical values, and monetary units should be no exception: 13.7kg, 55BTC, 3 apples.
3. Units-after-numbers is just a convention, and a silly one for that matter. The problem is that we are so used to its silliness that we fail to notice it. In this case, the weight of the quantitative statement is only determined at the very end, which can confuse, distract, tire, or disappoint the reader. I've lost over... 2,000 (ohohshit!!)... mBTC (whatever). On the other hand, when units are stated first, the reader is able to evaluate numbers in the correct context immediately, as we provide them. My BTC0.02.
That, and the BTC symbol should appear in regular, not bold font. It stands out too much like this.