Bell & Ross use the same relatively cheap ETA movements as half the watch industry. So you pay a lot for the case, strap, name, design etc.
Personally I’d look at Chris Ward for some nice aviator / military / altimeter inspired designs which are in a similar vein to much of Bell & Ross’s designs. And Time Factors too. Both are about 4-500 pounds for a nice watch.
I’d be unsure about dropping big cash on one of the big square watches as I suspect they could date very quickly.
Or if you want to go really cheap, get a big mil style Seiko for about 100 quid, but to be honest, I find the chapter ring on a lot of them ugly.