We've had borzois, DDR and west German GSDs, wirehaired pointing griffon, and a staghound.
We'll definitely have more borzois. Also staghounds, and
possibly a Scottish deerhound. Robert still really wants one and I'm finally getting enough contacts in the breed that it might be a possibility.
Robert wants a spinone pretty badly. That will probably be his next dog.
Some day I'd love a cur of some type. No idea what it is exactly, but I've got a huge soft spot for them. I'd have to research the different types/lines more, but after raising Charlie with his ridiculous energy level and prey drive a working bred cur doesn't seem nearly as intimidating.
Scent hounds are another really appealing bunch. I love plotts, running walkers, etc. Again that might be something we'd get if I can get Robert to fall in love with the right dog.
I'd also love a guardian breed. I may possibly start with a kuvasz or a Tibetan mastiff, but eventually would love a central Asian shepherd, or a fila. I used to be on the fence about filas because they sound awesome on paper, but after meeting about a dozen in person from imported Brazilian working lines I LOVE them and really hope there is a place for one in our lives some day.