best budget board for 4790k

I'd recommend the following:
Gigabyte GA-Z97X-UD3H - Z97X-UD3H Motherboard
ASUS Z97-A - Z97-A 90MB0ID0-M0EAY0 Intel Z97 LGA1150

Both of the above will work well with 4790k and will allow you to overclock comfortably.