Well, here's the question you have to ask yourself: have you ever been super lean and had a ton of LBM? If you haven't you don't know what will happen. Chances are you're going to lose some LBM along the way. It's the nature of cutting and being in a caloric deficit.
I think it's very cool that you don't know how you will look when you reach your destination. Me, I've been every combination of fat and skinny, with a ton of LBM (like now at 150+ lbs of LBM) and with very little (less than 137). So I pretty much know how I will look at a particular combination - they key is just hitting which one I want at that time, but there is not going to be any surprise because, at some point, I've been there. You, you have a new look waiting for you and it's more urgent for you to get there to see it. If you don't like it, you can change and see what happens. Which, I'm sure you're doing given your very proactive approach and positive attitude.
Anyway, take a look at the very short distance track sprinters. Those ladies have a ton of LBM...probably more than you'll have.. and they don't look bad at all.
PS: When you hear it, let me know if you like that song. Then I can give you a bunch more suggestions for workout tunes.