I couldn't agree more! Esterbrooks were the beginning of my descent into vintage fountain pens. I started with a red LJ, and it's been downhill from there. Almost immediately after the LJ, I picked up a gray SJ, a copper dollar pen, a black J, a black transitional J (with a damaged cap jewel -- I haven't gotten up the gumption yet to replace it), another black transitional J (with a 3-rib cap), a desk pen (sweeeet!), a blue J, and I have a black dollar pen on the way.
Don't even get me started on the nibs! I've put together quite an arsenal of nibs, too.
It's hard to resist a beautiful pen that has so reasonable a price point and writes so well. Beyond that, they're very beginner-friendly when it comes to repair, as well. I've just re-sacced two of them, and they've been very forgiving.
I've begun to look at pen purchases in terms of how many Esterbrooks they'll cost.
Don