Maurus
The Great Gazoo
Trust me, there's no need to rush the instrument rating. You're probably better off getting those 50-hours of CC time under your belt before taking it on.
I always figured that the student would be safer having the instrument under their belt on their x-countries instead of just letting them loose right after their private ride.
Now if you are going for your Commercial, 141 could be a benefit assuming you are completing your requirements without going over too much as that is 30+ hours you may not need to pay for.
At my school students are getting their instrument done in a 45-55 hour range. Reason being that it is impossible to complete the lessons in the 1 hour minimum as a result of airspace and ATC.