I'd say I'm usually near a mains power supply yes. Because of the occasional rather than daily use, many of my tools are corded 230v items - it's also why I bought the rubbish Clarke Impact Gun.If you are always operating from a workshop (or convenient access to 220V), and are not likely to use it often - I would recommend not looking at a rechargeable unit - you'll save a load of money. I have a MOSS 1000W 450Nm 220V unit - it does everything I have every wanted it to do - biggest cars I work on are Range Rovers.
I'd certainly consider a (good) 230v impact wrench. I've never heard of your Moss one - I'll have to Google! My largest vehicle is the 2008 Renault Master Mk2 I've (mostly) converted road camper with mountain bike garage, so if it copes with everything on R-Rover I imagine it'd do the Master too.