I suggest getting a decorative plant stand (if you care about decor which I got a feeling you do, but any table or shelf will work) will be most helpful and place it parallel to the window. Then basically any location would be fine. Location two would be my choice with a new plant table because of the size of the window light won't be a issue, and you can fit more plants too
. Morning sun supposed to be the best, because it's not as hot. I have heating vents all over my windows unfortunately, but the mature plants do handle it fine as long as the roots are healthy and they are watered correctly (I'm not sure how bad radiators are compared to heating vents. Also be careful about over watering too)