Currently I own both a Stooge (Mk4) and a Vagabond, I’d personally spend the money on upgrading the Vagabond and other gear.
The Vagabond is a really capable bike, and I’ve done some pretty big gravel and bike-packing rides on it – many 100+km one day rides and 400ish km over 3 days recently.
Upgrades I’ve made are lighter/better wheels, bigger front ring, lighter seatpost, comfier (for me) saddle and I think that’s it.
It maybe doesn’t have as many mount points, but with a saddle/seatpost harness/bag, front harness/bag and frame bag it’s been spot on.
Though, don’t let me stop you from N+1 😁 Stooges are great bikes, and I defo recommend having one!