Standard Antenna is a Sensar II or III from Winegard
Best replacement ONLY IF THE ANTENNA IS DAMAGED is Sensar IV
If you are looking to upgrade.. Add a Wingman. much less expensive.
Next upgrade (NOTE this applies to the Sensar IV as well) is the SENSAR PRO indoor module (power supply/source switch/ much more)
That is what I run, amazing improvement.
Lab and field tests both show.. NONE better.