I did the same, but I got my XL2 very early in the sequence, so in my eyes, there really wasn't anywhere to go up to. And for a very long time, my only, or one of 2 basses.
Mine has a low 2 digit S/N and I was told by Status it was 1984. There's an older one (sold) on Reverb with 388 S/n advertised as 1988 by BassBros, whom I think are pretty good store.
Try stuff until I like how it sounds, and realise it will be different for different venues, bands and even tracks.
Don't get too cork sniffer about tone.
Sweet. Love to hear a review once you've had a chance to play it. I'd love one or even a 6.
Which finish did you get?
Sire told me 18mm - I asked them a while back.
Ibanez SR655E; 16.5mm reverse P+J Nordy designed PUs. I have one and it's very good. I won't mention what I paid for mine, but lets say with an Ibanez OHSC, I got change from 250 pounds.
The SR755 is very similar.
Steinberger Spirit or Hohner B2. Add a strap pin extension and a single ball adapter and you're gold. I've had an XL2 for 38y and B2 and Spirits for nearly as long and they're great, especially the older Hohners. Nothing else will be as compact, cases are easy and cheap (rifle bag) and I've even played mine on a bus as you can play it vertically like an upright.