I. verticilata is also called winterberry. They drop their leaves in the winter and the berries are very striking on the bare stems. They should be hardy for you - I've seen them growing wild in central Maine. I think I've seen them anywhere between 3-4 to maybe 8-10 feet tall.
Enjoy! Nice for x-mas decorations.

I've had a winterberry and an inkberry bush growing for several years, but I can't get broader leaved hollies to survive.

We live in Northern York county, and a holly plant came with the house. It's doing fine, but will have to go eventually, as a door is envisioned in that spot for "Phase II" renovation of the house.

Some one thought to plant both male and female plants, so it does produce berries. It does keep it's leaves all winter, and the deer will snack on them. It is snuggled up to, well, actually planted as close to the house as the then-landscaper could get it, and this side of the house faces (roughly) south. Since icicles fall off the overhang, the plant is deformed. In spite of the pruning action of the icicles, it seems to thrive. There is no protection provided for the plant in the winter, just whatever snow drifts up against the house.

Local nursery man says holly is a questionable choice even in York county.