Seconded.
You can go “cheap” on RAM and Mainboard, since both are usually good enough anyways, but cheap PSU can damage the entire rest of you PC and there are really awful products out there.
An alternative to the i5 can be the Xeon E3-1231 V3, which is roughly equal (MHZ-wise in-between the 4590 and 4690 i5) but can perform better at paralized operations, which might be nice for rendering. Since you don’t want to OC, which is problematic for the Xeon unless using a custom bios on specific boards, it might be worth a look. The price range should be near the i5.