Hello Stefan and welcome,
With your username and when you said classic, I imagined a Gaboon ebony (black) topped Series 1 Scorpion as Chuck Panazzo from Styx played. I guess that will be your Alembic #2.
When ordering your custom, and you spending your hard earned money on it, you definitely want to get it right the first time. I ordered 3 Alembic's basically blind, having never really played an Alembic bass or guitar. I never cared for the stock neck dimensions posted here on the site, so buying used or on EBay was never really an option since I knew I wouldn't care for the neck dimensions. In ordering my customs, I was able to get the neck dimensions, profiles, and fret size that I wanted, and this is a huge part to my enjoyment of the instruments. So know your neck dimensions.
For any electronic package that includes a filter, I would suggest an upgrade to a 3 way Q switch. It is very inexpensive, and adds to the tonal palette of the instrument. And you can't go wrong with a FatBoy pickup in the bridge position, another inexpensive upgrade.
And be sure to wait for a good monthly special. It's a great way to save a few bucks.
You can see my Alembic Custom that was based on the Essence
here. I tweaked both the body and the peg head. It is everything and more than I had hoped for.
Good luck & have fun.