If your budget can stretch to £200, then the Cybex Sirona Gi i-size is lovely, and I think it's a little bit easier and nicer to use than the Joie and Graco. It also has a slightly higher weight limit with 20kg, rather than 18kg which is the usual.
The Joie 360 Spin and Graco Turn2Me (these are the same seat with different covers) are the cheapest I would go. These are at least decent build quality although they do have trickier safety straps, inserts, and they don't have much leg room when rear facing. If you're going to get this one then let me know and I will share a very good video which covers all the strap and insert use.
There are a lot of cheap swivel seats on the market and a lot of them are very poor quality, difficult to use, confusing safety instructions - steer clear of them.
Joie or Graco if you want to go budget. Graco Turn2Me i-size is currently the best price of these models, unless Joie still have their older version on offer in Tesco, I think it was?
It's recommended to keep babies rear facing much longer these days, at least until 15 months, but best for as long as possible. While the Joie and Graco and Cybex seats all technically have the same possibility for rear facing (up to approx 4 years) in reality many people find the leg room is tricky in the Joie/Graco seats by about age 2. The Cybex is a bit better in this regard.
The swivel seats can be a bit heavy to move from car to car if that would be a concern.