With a 400 budget I'd halve it between the guitar and amp, tbh.
I dont really have any advice for the guitar though. I will say that I had a similar quest to get a cheap strat, but the money I wanted to spend was lower and I ended up with a Westfield, which, despite its obvious and fairly numerous flaws is a goiod guitar in a lot of ways that count: well enough put together, good acoustic tone, good pickups for the price point, around £100: I got it for 50. Flaws include poorly matched multi-piece body, pretty lousy frets (at least level, but rough), cr@p nut, slack feeling, quite unstable tuners. All to be expected for a very cheap guitar and tolerable or fixable.
I may have lucked out though. I dont know what the overall quality of westfield is.