If you live by an rei you might want to check out their Cirque ASL 3 . Its listed as a 4 season tent but in the video they its mentioned as a light duty 4 season tent i believe. You can also find a sierra designs Alpha for around 250$ online. The cirque might be a better option if your going to use it in summer since it looks like it has more ventilation and two vestibules.
_________________________
My gear is no where near lightweight