I had a chance recently to see (and hear!) their tourbillon minute repeater - absolutely incredible! But even their "basic" watches are extremely well made.
I have bad news for you though - you might have to go for that datograph perpetual tourbillon, especially if you can find the white gold ... Or the 1815 rattrapante perpetual. You can "complete" the Lange 1 look with the perpetual, but somehow it seems to me that a disruptive complicated piece would