a DTV specific antenna does help with the signal, but not required.
There's no such thing, except in the minds of the marketing folks.
DTV is still on the same UHF and VHF bands as analog was. Any antenna that worked well for analog television will work well for digital TV if it is properly installed and aimed, and contains elements for VHF and UHF.
In many markets, most stations are now on UHF, regardless of the channel number you watch it on. In Madison, WI, the full power stations are all currently on UHF channels 26-50. There is a low-power on Channel 8, but at your distance from Madison, it won't likely be receivable anyway.
Without knowing your exact address and looking at a terrain map, I can't immediately suggest an antenna gain (size), aiming bearing, or height. All can be calculated if the exact location is known.
In any case, Over the air TV is the best quality TV you can get. The satellite and cable companies reduce resolution and quality when they get the signals from TV stations, because space on the cable/satellite is limited, and they squeeze as many channels as possible into a small space.
Congrats on the new place.