I find TomTom more user-friendly than Garmin - it's all a matter of personal preference, so the only way is to go somewhere like Halford's and play with them. I've never seen one that allows you to specify OS grid references but Lat/long is common and most have "Places of Interest" eg, tourist attractions, car parks etc. The more expensive they get the bigger...
21:19 Fri 26th Oct 2018