I would not worry about lower DF. Inductor in series with the woofer has resistance in order of 0.1 ohm limiting DF to 80 anyway, not to mention that speaker's own impedance is mostly resistive. Even 4 ohms would make DF=2. Additional resistance in series shouldn't contribute much. Less than 10% would be ideal (0.4ohm). I would worry more about reactive inductance of the cable at high frequencies (higher for thinner cables). Assuming 0.4uH/ft your 12' cable would have (both ways) 24ft x 0.4uH = 9.6uH. Reactive impedance at 20kHz would be 1.2ohm. On the other hand tweeter's impedance can be pretty high at 20kHz making it unimportant.
I'm using Acoustic Zen Satori. Silky smooth and fast. It should be within your budget (used).
I'm using Acoustic Zen Satori. Silky smooth and fast. It should be within your budget (used).