Should I go for the Radio Shack model or the ScannerMaster one?
Are they the same thing?
I have 15 different antennas for my GRE500\600 and I always go back to my Watson 889. The RS800 is a very good 800 antenna so going with that is not a bad choice. I use both but prefer the 889, it equals the RS800 antenna and out performs it on VHF\UHF. The tricky thing about antenna reviews is every system and location is different so what works for me might not work for you. The 889 swivels so you can lay your radio down and adjust the antenna to your target.
Mike