For another ten pounds you can get a motherboard that doesn't suck. For instance, Scan.co.uk: MSI 870-G45 Motherboard
Don't skimp on the power supply. You will regret it soon enough. Get a name brand. Corsair, Antec, Thermaltake...etc Here's an example: Scan.co.uk: Corsair Builder Series CMPSU-430CX 430W Power Supply (PSU)
If you're spending money on a board to game, (with the 550 GPU I'm assuming you are at some level), spend a little extra on the parts that count. Motherboard and Power Supply Quality go along way. Trust me, I've tried to save some money on those points and didnt work out for me.
Outside of that, it's all very good.