Hi,
Not sure if this link will be of help to you, but may help you decide?
http://www.cameras.co.uk/camera-lenses
Years ago when I used to do photography (SLR film camera), Tamron lens were the one's to go for as an aftermarket manufacture.
These days with companies buying other companies, I'm not sure if Tamron are owned by another? Hence why I've sent the link as I'm a bit rusty with cameras. Just getting back into it myself, only I'm using a bridge camera at the moment.
Hope the link helps you out.