I ride my Big Block anywhere and everywhere as it is a very comfortable ride. I have 32mm tires on it and it handles even gravel like a champ. I find it very comfortable. I have a nice broken-in Brooks saddle on it and nice padded bars so I feel like I can go a long distance in comfort.
I hear you on the lugs though, I'm a big fan of lugged bicycles and most all of my geared bikes are lugged steel. Good luck with your new frame and make sure to come back with photos when it is finished!