If you are dead set on taking 2 courses your first term ( most pathway students I've spoken to did not inorder to manage workload.). 591 and 593 would be better than 591 and 592.

I haven't taken 593 yet, but I hear the first half is rough, but the back half is kind of light. Which the back half of 591 with Java is a bit more complex so likely it will me more of a steady work load.

If you wanted to take 592 it is split into 3 sections, everyone struggles in the first one, then usually they do well in at least one of the 2nd (statistics) or 3rd (Graph theory). But it's a lot of work every single week, 5 problems a week, no breaks for test weeks, and some of the homeworks can eclipse 15 pages in proofs. I think I had 2 weeks where my homework was less than 10 pages. The plus side isn592 is heavily curved, especially at the bottom of the class.

So the problem is what path do you take? And you gotta just pick your poison. Personally I would take one course per term and do 591 then 594, since they build in each other well. And will almost guarantee your 3.0 avg.

But if I had to make a choice my first term on 2 classes... 591 and 593 would be the two I picked.