Old thread, but I have a Wouxon KG-UV7D(50). I have a couple Diamond antennas that are triband and include 6m (SRH940 and SRH999). A little pricey antennas, but work well. The OEM stock antenna that came with it couldn’t get into a couple of local 6m FM repeaters, but the Diamonds had no problem. I even had a QSO on 52.525 simplex with the SRH999. It wasn’t out of the blue, but after talking on the 6m repeater, decided to try simplex.
As for the radio, I wanted the Yaesu also, but settled on the Wouxon. It’s ok. The firmware is definitely a derivative of Baofeng, but gets the job done. If you have local active 6m FM repeaters, I’d say go for it. I run a digipeater on both 2m (144.390) and 6m (50.620) also using a Yaesu 8900R and sometimes use the Wouxon KG-UV7D to send packets to it on 6m (using a MobilinkD TNC3 or EasyDigi). The KG-UV7D (and SRH999) are incredible on 2m, along with being ok on 6m. The KG-UV7D slowly depletes its battery even when “off”, so I just keep the battery removed when not in use. I also have a AAA case for it and battery eliminator.
HTH