MSR's Hubba Hubba 2-person lightweight tent was just re-released as the Hubba Hubba NX. Similar to the Big Anges Jackrabbit SL2, slightly lighter but slightly more expensive.
I haven't had the chance to actually use it yet, except for a test setup in the basement, but I did carry it home from the store on my bike and you can't beat the packed size and weight. The stuff sack it comes with has compression straps built right in, too, so especially if you take the poles out to carry elsewhere (strapped to your bike's top tube or elsewhere on the frame or rack, perhaps) the tent, fly and groundsheet can be compressed down to an impressively small volume. The Jackrabbit has a more conventional stuff sack, so the extra expense of a third-party compression sack pretty much covers the price difference between the two tents.
As a bonus, MSR's footprints (groundsheets) are about half the price of their BA equivalent.
I'll also add to the "go with N+1" when purchasing a tent; even the two-person jobs like the NX or Jackrabbit really aren't that big, especially if you have gear you want to store under cover as well.