Hi Timmy, I would stay away from the Hornby controller. As your layout grows and your collection of locos increase you will need a DCC controller to be able to handle them. I would recommend the NCE power cab, it starts from £136 stg in the UK and will cover all your needs straight out of the box. It can be upgraded to a 5 amp system and you can add additional hand sets to it. You can also control your layout from your computer through the NCE.
I have been looking at changing mine and the NCE is the way to go.
At the end of the day you need to choose a controller that suits you, just make sure it can cope as your layout grows