Got My Samsung Galaxy S2 now. Love it - would definately recommend. Screen is crystal clear at pretty much every angle you look at it, most of the apps I've found are pretty sweet. Pretty easy to customise and in my opinion (Never had an smartphone / iPhone before) Very easy to pick up how to use it. Fun finding out all the little tricks on it!
Only little niggles with it are: Camera Doesnt instantly take the photo when you press the take button, so you have to hold it a split second longer - doesnt really effect much, but its just a gripe
and ...
The battery life isnt great, however disabling background data, and putting on Juice defender, and enabling power saving mode, as well as notching down the brightness of the screen a few gives you a lot more out of it. If you are just going on social sites for 5-10 mins a day, listening to the radio or music for say an hour in the day, and doing the normal text and calls, you can perhaps squeeze out 60hours out of it. (just over 2 days depending on your usage)
If you really push the dual core cpu (I.E. play a game whilst on the internet and listen to the radio, then record, photos etc etc) you can run through a fully charged battery in about 6 - 8 Hours (This is intensely using it for that time) My usual usage means I get about a day and a half out of it, and I play a few games, facebook, radio 30 mins, and bits and bobs.
Bear in mind my recommendations come with no previous experience of smart phones, but it definately looks and feels like a winner for me! (also can pick up pretty good deals on it atm, with the iphone5 on the horizon)