If this is a 3-season tour and not stealth camping, I would suggest a tarp tent... I have a henry Shires Cloudburst which is a 2 person tent that can weight as little as 2lbs to 2.5lbs depending on what option you get (sewn-in floor) or a simply groundcloth. They are also HUGE. My two other tents I use backpacking include a Walrus Zoid 2 (same as the MSR Zoid 2), an MSR Zoid 1, and a Hennessey Hammock and the Cloudburst is the largest tent I have ever seen and the lightest tent I own (besides the Hammock). It also is very packable, being a lot smaller than the Zoid 2 and a lot lighter. However, being a large tent, it's not as nice when trying to find a stealth campsite because it needs a large footprint. It also needs to be carefully pitched than say the Zoid 2.0. being large and a single-wall, it is susceptable to a lot of flex if there are crosswinds so you need to pitch it into the wind or bring some guylines to tie down the sides.
But other than that, mine has worked well for me when bike touring. The only other weaknesses i can think of is the lack of a bathtub floor so no pitching in large puddles and the poles are long, they just about fit inside my panniers (carradice Super Cs)if I put them diagonally.