Looking to Upgrade CPU

[Denicide]

Hi. So I've bought Dragon Age: Inquisition without checking the minimum system requirements, and since I got it from Green Man Gaming I now can't get a refund. In any case, I want to play the game enough to upgrade my PC to do it. The main issue is my CPU: I have a dual core and I simply need a quad core. Below I've listed my computer as it stands:

AMD Phenom II X2 550 Processor
10 GB DDR3 RAM
NVIDIA GeForce GTX 750 Ti
MSI 770-C45 Motherboard

What I'm looking to do is upgrade as cheaply as possible to run DA:I well. If that takes upgrading more than the CPU, so be it, but I wanted to ask your advice because I know very little about hardware. I've also posted the minimum and recommended specs for DA:I (as written [URL="http://www.dragonage.com/#!/en_US/news/pc-systems-requirements-revealed"]here[/URL]) beneath to give some idea of what I'm after.

Minimum

OS: Windows 7 or 8.1 64-bit

CPU: AMD quad core CPU @ 2.5 GHz/Intel quad core CPU @ 2.0 GHz

System RAM: 4 GB

Graphics CARD: AMD Radeon HD 4870/NVIDIA GeForce 8800 GT

Graphics Memory: 512 MB

Recommended

OS: Windows 7 or 8.1 64-bit

CPU: AMD six core CPU @ 3.2 GHz/Intel quad core CPU @ 3.0 GHz

System RAM: 8 GB

Graphics CARD: AMD Radeon HD 7870 or R9 270/ NVIDIA GeForce GTX 660

Graphics Memory: 2 GB

I should also say I live in Ireland for shipping purposes.

[Denicide]

Well, I'd rather review all my options before I decide, I guess. Any recommendations for a CPU + Motherboard combo?

Thanks for your help so far.

[editline]27th November 2014[/editline]

Well, I'd rather review all my options before I decide, I guess. Any recommendations for a reasonably cheap CPU + Motherboard combo?

Thanks for your help so far.

[Daemon White]

If you want to keep your motherboard, the best you could do is a Phenom II X6 1100t. Otherwise, it would have to be a motherboard upgrade, and perhaps an i5 chip.

[Daemon White]

[QUOTE=~Kiwi~v2;46589048]isn't the x6 still outrageously priced?[/QUOTE]

Geez, yeah it is. Sorry, I didn't check recently and it's gone up since I last saw it. Used to be ~330 (I might have been lucky and saw it on sale though), now is 400.