for me i got a GIZZMO IBC MS, cost about £200, you can get the lower spec ones for about £170.
lower spec has three settings, the upper spec has six settings, plus a scramble button that will add a touch more on a button for a specified period of time you set it for.
easy to use, instructions are a bit of an arse, but simple once you read what hold and press means lol!
so very easy to wire/fit too.
recommended by members off here and reviews on the old net.