I agree with cc_merchant. The i7 of Haswell or newer generation will automatically turbo to 3.2 GHz when all four cores (or eight threads due to hyperthreading) are in use, which will more than compensate for the base clock speed deficit. The i5, even at maximum Turbo (which is 3.6 GHz when only one core, or two threads, are in use, or 3.3 GHz when both cores (four threads) are in use), is simply not fast enough to compensate for the core/thread-count deficit. Remember, when running CPU-intensive, decently-multithreaded apps a dual-core, 4-thread CPU needs to run at almost 5.0 GHz just to even match the performance of a quad-core, 8-thread CPU that's running at only 3.2 GHz.
Keep in mind the new Skylake mobile and desktop chips are out. DDR4 has a significant impact on AE and media editing applications. I would suggest starting there whether you are looking at a laptop or desktop.