Hi and welcome along buddy. The best thing to do is if you want 1 get 1. Why worry about depreciation? every car depreciates well mostly lol. you only live once buddy...
I've got a Honda civic gen 9 12 plate diesel. Its brilliant for mile munching, I do around 30,000 miles a year and it just keeps plodding along. I also get around 60-80 mph which isn't bad at all. I highly recommend 1.