Best LNB for UK Motorised Dish & Weak Signals

I originally fitted a IBU Single, which seems to be working fine but needed another output.
So ordered a IBU Twin, which has just arrived and now I'm wondering should have I got a Quad!

I'm sure a lot of you have tested LNB's, wondering what Twin and Quad you have settled for and what opinions you have.

Debating putting this Twin up as I might be able to get something better.