One step at a time :-)
Let me plot a course for ya:
1. Generations
2. a Starwalker, or a Boheme
3. a classic Meisterstuck or a LeGrand Meisterstuck, or a Solataire (metal pens)
4. the 149
5. Writers' Edition (some or all of them)
6. Patron of Arts (they are beautiful! 4810 or 888 versions)
7. the skeleton series (John Harrison is one of those)
8. then the limitation of 4 pens and limitation of 1 pens :-)
Step by step
Ops, the above is just the modern pens. Do you want me to plot a course for vintage ones?