Afternoon 
I'm thinking it's about time I upgraded from my q6600, which is obviously gonna require a complete overhaul of almost my entire rig. It's been years since my last proper upgrade so I'm pretty clueless about the best hardware to use at the minute.
I bought a gtx 570 about 2 years back and think its always been bottlenecked really... I paid £280 and they look to be selling for less than half of that second-hand. I was looking to SLI eventually on my new board, but don't know if I'd be better off selling the 570 and investing in a better card instead, whilst saving money on a cheaper mobo?
The other thing I'm unsure about is CPU performance. Are they at a point where overlocking is pretty pointless? I'm eying up the £150 Haswell CPU but noticed the previous generations are often still more expensive.
My budget for a CPU, mobo, RAM and SSD is about £400, I might be able to stretch further if a GPU replacement makes sense. If I was to replace my GPU though, I'd like to make the move to a mini-ITX gaming rig if possible.
Just looking to throw some ideas around and find out what might be the best way to go from peeps who are more in the know than me

I'm thinking it's about time I upgraded from my q6600, which is obviously gonna require a complete overhaul of almost my entire rig. It's been years since my last proper upgrade so I'm pretty clueless about the best hardware to use at the minute.
I bought a gtx 570 about 2 years back and think its always been bottlenecked really... I paid £280 and they look to be selling for less than half of that second-hand. I was looking to SLI eventually on my new board, but don't know if I'd be better off selling the 570 and investing in a better card instead, whilst saving money on a cheaper mobo?
The other thing I'm unsure about is CPU performance. Are they at a point where overlocking is pretty pointless? I'm eying up the £150 Haswell CPU but noticed the previous generations are often still more expensive.
My budget for a CPU, mobo, RAM and SSD is about £400, I might be able to stretch further if a GPU replacement makes sense. If I was to replace my GPU though, I'd like to make the move to a mini-ITX gaming rig if possible.
Just looking to throw some ideas around and find out what might be the best way to go from peeps who are more in the know than me