OK, I do this at New South..
It's a great course, although PECO1000 (the introductory subject) is more like a history of economic thought as opposed to actually theorising etc, but all of that stuff comes in 2nd and 3rd year anyway.
USyd's lecturer for this course is Frank Stilwell, who wrote the textbook we use. Unfortunately, he is the economic spokesman for the Greens party, so I've heard, which can allow for some inherent bias in his teachings, so make sure to watch out for that. George Argyous is the main course co-ordinator at New South and he is a close colleague with Stilwell, and they share similar beliefs. Already this year, we have been subjected to a rant on why drugs should be legalised and why it is the only way to go about drug policy, which is sad and disturbing.
There's a few economic concepts explored that we also cover in ECON1101 (which I also do), but they are only there to substantiate theories and to provide reasoning to things. My main essay question for PECO1000 this semester is "International trade and globalisation will be to the benefit of all countries which participate in these processes. Discuss with respect to at least two of the major schools of political economy that we have covered this year."
Also, I do POLS1018, which is the main introduction to Political Theory. This overlaps with Political Economy as well, obviously on the politics side. A lot of political concepts apply to Political Economy in the same way as economics, so it is a nice complement.
The lectures are ok, although two lecturers are somewhat boring.. One is monotonous and tangenital and the other reads straight from the slides with little variation. The third is the course co-ordinator and his lectures are free-flowing and engaging. The tutes are great, becuase we have organised debates every second week and discussion points on the other weeks to argue with the tutor.
The assignments aren't much at all. They consist of delivering a debate speech and the subsequent 1500 word debate report, as well as the essay mentioned above. Easy if you're good.
If you want to do politics as you mentioned, I recommend doing a POLS course, but PECO is also an excellent choice, as are the two together. POLS and PECO were my intended majors before I started my degree and they still are, so it's good.