theres a company called six moon designs they make a great tent called the Refuge. it has a bath tub floor and can seal up real tight...i have never tried one but they seem to be the rage. they also do seam sealing for extra $$$.

also GoLite makes some nice lighterweight tents. they sponsor andrew skurka and he stands by their gear.

EUreka makes some nice solo tents with not much room.

do you know how heavy your current tent is?

also the sixmoondesigns Lunar Solo or Lunar Duo....

also the black diamond first light