Ok so I will keep this one short!
A tip from me for when buying your rings would be to buy them as soon as you can! This is because every January the jewellers put their prices up - quite alot sometimes! For example mine went up £300 and David's went up £200, so if you've got the money set aside, get them bought!
There are many styles to go for.
But always remember - you have to go for the same metal as your engagement ring, otherwise the stronger metal will wear down the weaker. For example of your engagement ring is 9ct gold, don't go for an 18ct gold wedding band.
Alot of the time you will find that jewellers do the same rings but in the different metals, and colours.
Hope this helps!