Posted: 24/06/2013 at 14:26
I'm not sure exactly what McCulloch you're looking at, but I bought the McCulloch M40-125 Petrol Mower from Toolbox.co.uk, here: Petrol Push Mower
I've had it for around 6 months now and it hasn't let me down yet. Its around your budget, and may in fact be the exact one you're looking at from Argos.
The mower took a couple of uses to warm up but after that it was spot on!
My garden is very long and this mower deals with it just fine, the capacity is pretty good for its size and mobility is also great. (My garden is filled with the kids climbing frames and slides.)
If you need anymore information on it or advice just give me a shout!