Price performance up to your expectation?
For price performance thing is quit subjective, because if you look in terms of how much improvement vs the LCD 2 in terms of performance I won't say it's good because although it win in soundstage it lose in trebles, so if you like violin music and u like the violins more forward then LCD 3 is not good at all for that. If that's the case not worth the money
If you like bigger soundstage irreguardless of what, yes then LCD 3 is worth the money. Because if you don't pay that amount u won't get that sound.
For me I use it for mixing, and compared to the LCD 2 , LCD3 is much more neutral so yes I would say to me is worth the money. I pay for something that is really useful to me.
Some people may argue that LCD 3 sucks for mixing, because there are cheaper alternatives that quite a lot of people use like Sennheiser HD 600, 650, Audio technica M50, etc, those people will say LCD3 for mixing is just nonsense. However I do not feel comfortable mixing on those platform compared to the LCD3, therefore I would say yes it good for price and performance. Another headphone I feel it's good for mixing to me is Stax 009, however I did not hear the LCD 3 and stax side by side so I can't give very detailed comparision. But if I remember correctly stax 009 is brighter, also pretty neutral.
The LCD2 I'm refering to is the LCD 2 rev 2. For LCD 2 rev 1 , the LCD 3 owns it completely, it's like an upgraded LCD 2 rev 1 actually in my opinion.