A 4670K to 4770K in gaming is hardly noticeable primarily because both are quad cores and Hyperthreading offers maybe 15% performance gains over switching it off, the $130 difference is not justifyable in that regard. A SSD is the biggest single upgrade a system can have over a Graphics Card, no system should suffer without a SSD. A system with a 4770K and mechanical hard drive will take 30seconds to boot a system with a Celeron and SSD will take 10 seconds to boot. Copying 30GB's of data around on a SSD takes around a minute or two, on mechanical with a 4770K will still take 20-30minutes. Not to mention how responsive your system is with a SSD, its like night and day. I guarentee you if you take a 4770K you will regret it because a SSD's system impact is immense and very noticable.
Get a 4670K and SSD you wont regret it, once you go SSD you will never go back.