Used Hartke XL 215
This cabinet is a total rock machine. It's got some mass, but totally affordable and will match with any 300 to 500 watt head. It's in good condition too.
215XL Deep low end with a dual-ported cabinet design and two premium Hartke 15" XL aluminum-cone drivers. Handles up to 400 watts at 4 ohms. Frequency response is 30 Hz to 1 kHz.