For your rim choice, the TK 540 are definitely not an update (from DT Swiss) for the Open Pro,
The TK 540 (previously TK 7.1) is a heavy duty rim, yes you can use it for road riding, but having used them for the last 10 years for commuting, 25mm is the smallest you really want to go, 28mm and up is better, but the weight vs a rim like the Open Pro (from DT Swiss, something like the RR 411) will be noticeable, they build strong and pretty heavy.
Going by your height/weight, these will probably work fine for you, just don't expect them to be particularly light when built, or take narrow tires that well.