Streamer Pro is balanced and costs about $500. The Violectric 180 is a balanced and SE port amp - but does it have the power to push Planars? Dunno.
The Lyr is just such a deal ($449 for tube/SS hybrid, American company, refreshingly engaged customer service, STELLAR warranty, and powerful enough to power ANYTHING) that I'd rather, if I go balanced, wait for a Schiit balanced version of a Lyr type product.
It's that sort of customer care that makes me a rabid fan of a company - it's why I'm a Mac user even though it means a few limitations and compromises.
The main benefit of balanced is a low noise floor. I was going to go with a Meyer concerto because it seems developed to achieve the same results with SE, and it drives the LCD-2 quite well... But I've heard great things about the Schiit line and when you factor in all the other factors, including the amazing price, it just seems like a no brainer to me.
Lastly, although HD 650 and LCD-2 are easily recabled without solder, some of the other high ends aren't. So if I go balanced, I would have cans that I can't demo with other chains that aren't balanced. Lastly, there is the cost of upgrading the chain and cables to balanced.
Anyway, that's my reasoning. Also, as great as I hear the Audio G-D products are, the idea of placing $1.5k in the hands of a distant Chinese company gives me pause. I haven't looked into the warranty, but the hassle of transcontinental shipping, the delays involved, the uncertainty and possible infrequency of communication that's limited to email - all give me pause.
This is NOT a slam on Audio G-D - I've heard rave reviews! I wouldn't mind trying out a FUN, and it's significantly cheaper - so getting hosed on it (if it happened) would not bum me out as much. It's weird that I'm at a a stage of my life where a couple hundred dollars doesn't have an earth-shattering effect on my life/happiness, but it doesn't. $1.5-2k dollars is money with which I'm significantly more....'thoughtful'.