[victorgte]

45 profile is the correct size rather than 50 but nothing to worry about as your speedo will be only slightly inaccurate. Will be slightly more comfortable too with a bit of extra rubber cushioning the bumps.
Personal choice is top brand tyres. Budget tyres may be fine for pootling about but from experience when you really need to stop quickly, they are useless. Top tyres will grip better in turns and stop quicker too. Look at the tyre labelling. If the wet grip symbol has A, B or at very least a C then it’s going to be better for you.