The Samsung 840 Evo seems to be the one that a lot of people go for – best perfomance for the money (get 5 -10 % more speed for double the price, sort of thing)
Great reviews all over, most popular by far on amazon, loads of 5 star reviews, not many negative.
The migration software that comes bundled with it is pretty easy to use too – you just need an enclosure to plug the SSD into the machine with during cloing, then you can swap your HDD over into the enclosure, and your SSD into the machine when it’s cloned.
Edit – I had a bit of a mare cloning mine, but that’s because my old HDD was a bit buggered. Easy peasy once I’d been told what to disable/change though, thanks to someone on here – page file or something?