Tyres are 'the most important' thing on your bike.
They are the only thing in contact with the road surface.
Bearing in mind that our climate is about 80% wet and 20% dry it is I believe very sensible to use tyres that are better suited to wet conditions. With this in mind I switched to Michelin Pilot Road 3's about a year ago.
These tyres are great (best tyres I have ever used)
They last a very long time and don't do 'White line Shimmy' (even though I have tried to induce it by braking on a wet White line)
Trust me - these tyres might increase your confidence at anytime of the day (and in all weathers)