I am looking for a RD for my dad but he wants to spend less than $200. I was looking at the Bel's line up and the Vector series 940 can be had for $150 or so. The top model 955 is almost double. But on the GOL test there was not much difference and actually the 940 did better than the higher models? What are your opinions regarding the 940? Anything else that is better for similar price? Thanks for all inputs.