Miles Ahead is about the same time as his late '50s stuff, but it's not much like it; it's definitely on a lesser scale and is easier-listening. I have no idea at all how you would react to The Birth of the Cool. I'm pretty sure just the studio portion is Evans'. I don't think you'd hate the album; you might be really bored or underwhelmed by it.
Stuff I have of Evans as leader:
- New Bottle, Old Wine and Great Jazz Standards: New arrangements of great jazz compositions from the '20s through the '50s. On the one hand the tunes may do nothing for you, though on the other there are many less pleasant ways to become acquainted with some of the great numbers.
- Out of the Cool and Into the Hot: circa 1960 and I can hear playboys in their bachelor pads sipping martinis or some shit listening to these records. I've heard the former more, mostly because it has "La Nevada", the best track on either disc and a version of which also appeared as the lone non-cover on Great Jazz Standards. These are recommended.
- The Individualism of Gil Evans : Good, but really long on CD (it's the bonus-tracks-integrated-into-the-tracklist kind of deal where it's effectively a new, expanded album). I think this is 1964. It's the Evans that's made the least impression on me and which I'm struggling to come up with a single track save for "Spoonful". Yes, that "Spoonful".