It looks like all your channels with the exception of CICT (ch 41) come from a signal direction (compass heading 316 degrees). Most of them are also pretty strong.
Since you have multiple channels in the high and low VHF bands, you'd be best off with a full-band combo antenna like the Winegard HD7080P. Since your strongest channels are quite strong, I strongly recommend against using any kind of amp in your setup. With signals at this level, most amps would be overloaded in this situation.
Yes, you can put the antenna in the attic. However, to compensate for some building loss, you may want to consider going up one antenna size to something like the Winegard HD7082P. This can help with channels that are lower down in your list near the "red" zone, like CHCA (ch 44).
The amount of signal loss through your roof depends on many unknown factors like construction type and amount of conductive materials (e.g., nails, ducts, plumbing, electrical wiring, metal bracing, wire mesh, foil sheeting, etc.). Many people have had good results with attic-installed antennas, but each situation is unique, so your mileage may vary.
BTW, the antenna itself doesn't care whether the signal is analog or digital, nor does it care whether the signal is carrying standard definition or high definition programming. Any marketing claims that say an antenna is specially designed for digital television or HD programming is pure hype.
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