After now playing on DX2 again for a while -- I think Knights Templar is a superior module.
I would, however, like to keep going on DX2 for a while.
I don't play as often as I once did (many years ago!) and I've only just started getting into D18 (Hell) levels.
It would be nice if you can leave DX2 up for a few more weeks/months -- as then I'll maybe be able to have a crack at Bad Ash, Rainbow, Zero Wing & Vile King (etc) areas.
I am, however, finding that the gems that are needed to get into some of those areas are kinda few and far between ... especially considering that death will probably happen fairly fast upon entering the zones for the first few times