Okay I understand you by saying building and upgrading a pc is fun but I said "work" because you have to sell the 4770k + mobo and stuff.
If rumors are true we will see a 6 - core for 300 bucks anyways with Haswell - E and there will be more reasons to upgrade.
SSD: It is faster but a good hdd like the F3 is already fast. I prefer SSDs for Windows not only that programs etc start faster but the multitasking is alot better. Downloading, updating, multiply programs .. it feels great for office, gaming etc
Its also nice to have windows + some apps on the ssd and all the other data on a seperate drive.
In Games the ssd will help only in loadscreens. Not that important for myself except for PS2 which benefits alot from a ssd.