I was impressed with the Weaver Grand Slam it was a very nice scope in all areas. I'd opt for the 3200 as I saw no real advantages over my 3200 to the Weaver. I haven't even looked at the VX II so can't comment on it but I will tell you I picked a 4200 over the Vari X II prior. I like Leupold a lot but never found there midgrades models previously to be worth the asking price, as such I have gone with other optics instead. That being said I have heard some good things about the new VX II. However both the grandslam and VX II actually go around the same price as the 4200 Elite up in canada that I have seen and I think this would a be pretty hard scope to beat (If eye relief isn't a huge concern, if it is go with the loopy!)

Customer service for both Leupold and Bushnell is rock solid, so wouldn't worry about either of these 2 companies. I am not sure about Weavers though, they do offer the lifetime warranty like the others.