Hi I have always liked the Rip9 because it lifted my riding higher than I thought it would go.
I have just built up 2 Rip9 Alloy bikes for friends & they like them,
The Jet9 RDO is a much better climber than the Rip9 & that's because the rip9 isn't a good climber because it was much better than my Tallboy carbon.
If you can some how come up with the money for the RDO buy that, However if you can't the Rip9 is still an awesome bike.