The MSR Hubba Hubba looks quite good.

The tent is also available in green and an additional MSR Gear Shed Vestibule is available so that you can store additional gear. This can be purchased at a later date if you need to expand your requirements.

It also almost 1 lb lighter (pack weight) than the MEC Gemini, although it might be worthwhile getting the Hubba Hubba footprint as well as the ground cloth is somewhat lighter than the one specified on the MEC Gemini if used on rocky terrain.

Overall the Hubba Hubba does look to appear to be little more flexible to tailor your requirements.