So I've had a few instances recently with power loss and my servers aren't really happy about it. No data loss or permanent damage but I would like to protect against it in future and allow for a graceful shut down. So I'm looking for recommendations for a UPS. It needs to fit in my rack so rack mountable is a preference and it doesn't need to have a huge capacity (servers probably draw 5/600w between them at full load). Lastly with all these things I am on a budget, I've been looking at a few reconditioned APC units on online auction sites but I have seen some horror stories with their batteries and seeing as though this is to live in my house I would rather have something I can trust. So for a budget of around £200 what would you suggest?