Worth having a look on TZ-UK. The sales forum there often has some really nice pieces which people are selling on for considerably less than the original RRP. You need to register to buy, and you have to contribute minimum 50 posts to be able to post stuff for sale, but if you’re diplomatic, no one will mind if you make an offer on something in Sales Corner.
The two watches you’ve posted above are both rather nice, with a nod to the Omega Speedmaster – either of them should give you a dependable timepiece, so at the end of the day it probably depends which one you prefer the styling of.
If you’re looking to buy new, have a look at Creation Watches – they ship (very quickly) from Hong Kong, are often significantly under the UK RRP, and are very reliable.