The DFX has a display with good information on it and hundreds of settings that can be changed. I don't know how well you know your DFX so i can't tell you if you have an advantage right now over the Vaquero or Tejon. The Vaquero and Tejon are deep, simple to use detectors and can't be compared to a DFX. Not saying one is better than the other.....just pendends what features you want and need.
I own a Vaquero nexy to my other detectors ( White's M6, Garrett Ace 250, Discovery 3300, Garrett GTI 1500 and Fisher F75 on the way).
I wouldn't have the Vaquero if it couldn't do something the others can't. The Vaquero with the 5.75" coil is the hottest (deep !!!) small coil detector combo on the market.
Andy,NM