The 4i4 looks a good bit of kit and from what I read they have vastly improved the software.
But before you buy, take a look at the Behringer 404HD. Similar spec, a little bigger, but not much, and it £99. I’ve gone for that one but like all that sort of kit, it’s sold out but mine is arriving in about 10 days.
Good luck and let us know what you choose.