Looking for PSU that won't have the Corsair CX 24pin connector problem

Hi everyone.

I recently began building my first computer. It was going well up until the point of putting in the 24pin connector power supply. I'm using a 500W Corsair CX, and it has the (seemingly infamous) problem where it just won't go in. I didn't know about this until I had bought it, obviously. Should have researched more.

The latch is too tight, the pins inside are all at different depths and easy to wiggle around by touching the outer wires, and it's just generally really low quality. I've applied a lot of force while making sure the motherboard doesnt bend (by using my hands and some really soft cloth to support it) and it just doesn't enter, due to the combination of these problems.

I'm using an MSI Z97 PC Mate motherboard, one that seems to be known for having a tight 24pin slot. So I basically got two items that have "problems" and those problems really interfere with each other. I don't think I'll be able to make this work.

Instead, I'm looking to buy a new PSU for my system. Something around the £50 mark would be good, but I can go slightly higher for quality's sake. I'm looking for something that's in the 500W - 750W range. Something available from UK Amazon is preferred, but I'll buy from another site if it's a lot cheaper/only available there. Something with a UK power cord would also be appreciated, but I can also just buy an adapter.

In short, I really need a power supply that seems to have the lowest rate of 24pin connector failures, and the best build quality on it, while hopefully staying under £100.

If anyone wants or needs to see my whole build, here it is.

Intel Core i5-4690K 3.5GHz Quad-Core Processor
MSI Z97 PC MATE ATX LGA1150 Motherboard
G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory
Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
Sapphire Radeon R9 280 3GB Dual-X Video Card
Corsair 200R ATX Mid Tower Case
Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply
Samsung SH-224DB/RSBS DVD/CD Writer
TP-Link TL-WDN3800 802.11a/b/g/n PCI-Express x1 Wi-Fi Adapter

I'm not planning on overclocking, and planning to play games like Team Fortress 2, Borderlands, Borderlands 2 and Minecraft on reasonably low settings (if needed.) I don't care that much about super high quality graphics, I only really care about good framerate/no lag, but I also got a slightly overkill system in case I needed it.

Just providing that information in case its somehow relevant.

Thank you for reading.

Hi everyone.
I recently began building my first computer. It was going well up until the point of putting in the 24pin connector power supply. I'm using a 500W Corsair CX, and it has the (seemingly infamous) problem where it just won't go in. I didn't know about this until I had bought it, obviously. Should have researched more.