after giving this long, exhaustive thought over the last 7 minutes, i have chosen to steal the following for Boise:
1 - Albuquerque's Sandia Peak Tramway. I would have the base just off Bogus Basin road just outside the city and connect it with Deer Point to give skiers/mountain bikers a faster, safer, more fun way to reach Bogus.
2 - the Chicago Tribune Tower. at 462', the Trib would give Boise a much-needed "peak" tower without over-dominating the skyline. also, i love the gothic style... nobody does gothic anymore (or, nobody does it well). Chicago's got enough great architecture... surely they can spare giving us this one.