In short, you won't go far wrong with TNF. But there are lots of other tents out there that will work great. Sierra Designs' long-time three-season favorite is the Meteor Light ($250; www.sierra-designs.com). It's substantially larger than the Tadpole, with 13 more square footage, and comes in at just under seven pounds. Marmot's Odyssey ($240; www.marmot.com) is in between the Tadpole and Meteor, size-wise and weight-wise. Both the Odyssey and the Meteor Light have a taller roofline and more vertical sidewalls than the Tadpole, so they will feel roomier overall. But of course, the extra material and pole length will also add ounces.
For something a little different, consider the GoLite Den 2 ($199), a sub-pound minimalist tent that still offers plenty of shelter. Well worth a look, I should think.