My two cents:
Unless you planning to do some high altitude, high wind and snow camping, a dome tent gives great internal room as well as being free standing which makes it quick to set up and easy to position. Mind is a dome with and extra 1/2 pole over the entrances.
If it's for two people, buy a 3 person tent. Occasionally you might be caught in the rain for a couple of days and spending a day or two in a tent with your partner can be quite enjoyable, but you do want some room to move.
Lastly, for hot weather two full doors are great - you can get a bit of air flow (tents can get quite stuffy) as well as you then usually get two storage areas (under the flysheet but outside the inner) - great for dirty pots, smelly shoes and empty boxes of wine. As an added bonus you and your partner can answer any late night calls of nature without waking the other. Tents do get hot and although most can be erected without the flysheet it is still probably best to check - using it as a mosquito net keeps the heat down and the insects out.
Someone did mention Macpac - great tents with a fantastic ground sheet - bet heavier than others though. New Zealand brand found in Europe - not sure about the states. But a good tent last many years - so don't skimp too much. If you going to buy cheap though, buy fibreglass poles. If the break they can be taped up and still work ok. Cheap aluminium cannot be taped up and will often rip the fly when they break.