temps above 32 work fine for cold crashing, so i wouldn't worry about lowering serving temps that far just to cold crash.
as far as the IPA goes, if you had a nice, fairly quick, healthy fermentation, i don't see much problem with crashing after two weeks. i rarely leave beers in primary longer than that, but i am anal about ensuring the best possible conditions for a healthy, quick starting fermentation. it's usually done with the bulk of the work in 4-5 days, then i will leave it to clean up and condition a bit for the next 10 days or so. of course there are exceptions with higher ABV beers and such, but 14 days is usually good. that's not to say it tastes great right away in the keg, i usually let it cold condition while carbing for a few weeks to get the beer in its prime.