If this waqs between an apex and a viper, I may think the choice was tough, but between the rx-ton and the viper, I'd pick the viper any day. The rx is too heavy to be any fun if you ever do want to venture off trail or do anything other than just point and go. Also, with the rx, you're sitting really low, not like the new sleds. I don't find it fun or very rideable that way. With the viper, thrown on a boss seat and you're good to go. The rx also isn't fuel injected, neither is the viper, but if I was going 4 stroke, I thing I'd prefer fuel injected. Finally, as for the gas savings. I ride my 600 with 2 apexes and I am consistantly putting less fuel in mine then they have to in theirs, not by much, but it's less. I know everyone is going to say the rx 1 has more power for the fuel, and it does. But the point others were making was that the fuel savings would make it pay for itself. The only savings imo would be the oil, but I probably burnt a max of $150 in oil this year, which would take a long time to payback the $1500 difference. Anyway, even if the prices were the same, if I was planning to keep it, I would buy the viper. I just think it would be hard to have any real fun on the rx ton. Jmho.