A Meopta Meopro 4.5-14X44, HTR or regular, would stomp that Diamondback all day long, too, at an attractive price and weight. And, I think, keep up with or surpass the VX5 in glass and tracking departments.
The Diamondback 3.5-10x50 was an opportunistic (Black Friday) budget purchase and the 50mm objective meant larger exit pupil for low light conditions.
