Your cable management is terrible.
Don't worry, this type of sagging is common, just make sure to remove the card if you need to transport the system though, otherwise it's not an issue.
Off topic, but it may be better to turn the PSU the other way up: Right now it's sucking a lot of air out of the case which may cause increased temperatures with the GPU and CPU.
And yes, a better CPU cooler might be a good upgrade, the little Coolermaster 212 Evo will be an improvement over the stock Intel one, even if you're not overclocking it'll be not only cooler but quieter under load.