I think that for mixed home PC use the i5 is hard to beat for price / performance.
I recently upgraded one of my (self-built) desktops to an i5 6500 (socket 1151) on an Asus Z-170K mobo, with 8GB of DDR4 RAM, a 250GB Samsung SSD and a Geforce GTX750ti graphics card with 2GB of GDDR5 RAM.
Goes like stink, Win 7 experience index is 7.9 (max) for all bar the graphics (7.6) - there are better cards out there, but for price / performance it seems pretty good - and it does very well in various benchmark applications that I've run. I get no problems in running HD video full screen, and with the mild game play that it's used for it doesn't break sweat.
Including replacing IDE DVD RW drives with SATA ones (and a USB 3.0 front panel adapter), it cost just under £430 - but then I was re-using the case, PSU (newish anyway) and storage HDDs.
SD