Having two of the ULA packs I can say that their "max" load figure is pretty accurate for me.
However at the max load they are not comfortable enough for me for regular use. By that I mean that I can carry 35lbs in my Circuit but the difference between having that and say 25 lbs is very noticeable.
In fact over about 25lbs, I use another pack.
So I would imagine that to me 25lbs in a Conduit would not be all that much fun.
Keep in mind that I am not into endurance or suffering, when I hike I want to have some fun doing it.
The other point to consider is that if your total standard weight is up to 25lbs, when you need to carry extra water (that could be 4-6 lbs) you may find it difficult to fit it in.
On the other hand, the bigger the pack the more rubbish we fit in..
So I would go with the Circuit. But I am not you.
BTW, since the DR is pretty light, it should fit nicely inside the front pocket or across the top.
Franco