Some of the options above are just way beyond what I need but they look interesting to say the least.
I ended up go with a Tenda AC1200 Dual Band Gigabit Router. Was pretty much plug and play and I haven't had a single disconnect since, was going to buy an Asus but after reading up it was 3 times the cost for not much added value as I'm not going to messing with firmwares etc...speed via Wifi has also increased massively as well. Cost was £59.49.
Nice, would you say it has better wifi coverage than the SH3 then? Is it pretty much, turn SH3 into modem only mode then plug in the Tenda router?