Freein,
When it comes to a good bike , you're in the sweet spot for finding a nice one, new or used. The main thing is to get to know the guys at the LBS ( local bike shop) and find the right size, and ask their advise on the right style to meet your needs.
From there you can search for great used bikes in shops or online, but you will be using your LBS for annual maintenance. They can do a great deal for you, in helping get the best one, for sure.
usually the components make the difference between a low end bike and a pretty good bike, and they are all designed to be reversible down the road, ...ie , new replacement chain, etc
The new hybrids can go fast, but are durable for short trips and commuting with their high pressure tires. I have a rear rack on my Trek with a quick release pack that can hold a bag of groceries, or a small picnic;...but have ridden it 50 miles on some days because it's quick enough. Not fast like a road bike, but much faster than an off-road.
You'll just have to tell the guys at the LBS what your plans are,....you may end up with an off road if you plan on taking dirt, or sandy roads.
What color are you thinking about ?
.. it's fun to start checking out UK bike forums and Ebay over there. You guys are bike crazy, like here. Probably more !?!
http://www.bikebiz.com/index.php/new...-brands/016602
..just take your time , whatever you do because you'll enjoy it for years to come.