If you use them so much, have you considered placing them on a non-conventional place. For example the 1U keys on the thumb cluster are pretty bad as modifiers, but putting your most used F# keys there directly might be a good idea, probably much better than their usual spot at the top. That wouldn't exclude you from placing them somewhere else as well, for example the top row under a modifier (for consistency). I think algernons point was to simply state that using a modifier to access the F# keys isn't that bad. The Ergodox comes with more options(read: keys) to set up function layers, for less reaching, than the TEK, and comfortably so.