generally, a hoop tent (think conastoga wagon) will have more head and foot room at the expense of not being free standing. A lot of freestanding lightweight tents are a cramp for the 5' 10" average sleeper( feet or head will brush the wall, getting wet overnight) There are LOTS of quality, relatively inexpensive hoop tents from all the major gear manufacturers (think Kelty, Sierra Designs, Mountain Hardware, MSR-Walrus and Moss tents were both bought up by MSR-, Big Agnes, Hilleberg, etc...try to avoid eureka and coleman even though they do make some good stuff, light tents aren't their forte) and most all will serve you well. Try them out at a store first if at all possible to check on the length/headroom etc... Hillebergs are hella nice but pricy, and Stephenson's Warmlite, also pricey, are absolutely the lightest...

but remember, octogenarians have thru hiked the Appalachian trail sleeping under a shower curtain, whatever you get for shelter will probably work just fine.