I have a Canon EOS 7D (no grip) with 24-70 f2.8 and 70-200 f2.8 lens, and I shoot long exposure night shots of stars and also panning videos of panorama landscapes.
From experience, which tripod head and tripod do you recommend?
You need two different heads for these two things.
For the former, I don't have any direct experience, but you really need a tracking head that can counter the Earth's rotation. Such setups tend to be relatively pricey and rather unique to the field of astrophotography.
For the later, I'm a huge fan of my Bogen Manfrotto 3046 base with 501HD head, which is my general purpose tripod since I do a fair amount of video in addition to photography. You may want to go for a lighter set of legs for increased mobility, but you will certainly want a fluid head for anything that requires smooth motion.