^ @Uniquexme in my most humble opinion - as you describe yourself to be a headphone newbie - you could take time to learn how different kinds of gear sound and learn about your own listening preferences
. You can only do this through experience. If you jump straight into a 'high-end' system based on what "sounds better" to others, you are in danger of not appreciating it because you don't have a reference point in your own experience. You won't feel the satisfaction of "yes, this is so much clearer, more musical, 'better' than other gear I've tried (but I think it could do 'x' or 'y' a little better)".
Plus, what sounds good to us might turn out to be all wrong for you
That said, an LCD3 is a good starting point for many (or LCD2 or X if you don't mind starting there). In my case an LCD2 kept me "busy" and happy more than "a year or 2". It let me hear differences between DACs and amps as I became more familiar with the LCD2 and improved my listening.
I think you could be quite happy with your LCD-? and gain much valuable listening experience from trying a number of less expensive amps and DACs over a period of a few months. You might find this very enjoyable and - once you have heard a few of each - you will have a much stronger idea of what is missing for you
. Then, the impressions and reviews of others - with words like bright/dark, wet/dry, thick/thin etc - will become valuable as well.
All IMHO and FWIW - feel free to ignore if it doesn't suit your situation and goals