Top of my head: Glock 20, AR-15 (with proper tactical accessories of course), and Remington 870 Marine Magnum (again, with appropriate tactical accessories).
unlimited cash, thats easy.....An Aircraft Carrier, a Battleship and Aegis Class Guided Missle Cruiser.....But if reality were at hand. Then the following:
What i already have a SIG P229 9mm.
Mossberg M590.
Something i don't have yet: M1A Scout 7.62mm.
And all the premium self defense ammo and Federal Gold Medal Match 7.62mm i can find.