Congratulations on your success!
They've come up with a new "Gold Standard" for the Gray-Hoverman antennas.
GH with NARODs for VHF-HI & UHF
The last link is for 300ohm's new narod style extended GH with a fairly flat response curve and good gain for VHF 7 - 13 and all the UHF!
It's a bit too complicated for a first timer like me but with your experience, you may great results with it!
Good luck and welcome!