Northwest Harris County rocks! It's huge, its affluent and its THE fastest growing area of Houston. Great schools, low crime, forests, nice homes. Rather than single large cookie cutter developments it has hundreds of beautiful wooded neighborhoods each with their own personality. The entire area was originally settled by German farmers in the 1800's and many of the neighborhoods site on these former family farms and forestland. Just so you know, there are two high school zones you may want steer clear of (namely the one you're looking in which is zoned to Spring ISD - which has beautiful neighborhoods like Northgate zoned to it, but they're trying to rezone to Klein ISD. WHS and Klein Forest have drawing zones that go all the way to the Beltway and those areas South of FM 1960 filled in with apartments and lower income housing which significantly altered the white middle/upper middle class demographics of these two schools). Alternatively, if you have no kids, you can live in a HELL of a nice house in a great neighborhood for lots less than you should be paying! With that said, it's a HUGE area and the other 7 or 8 High School zones are great. Beats the heck out of Katy or Sugar Land (which are nice) any day, IMHO.
I would highly recommend living in any of the following NW Houston HS feeder zones: Cy-Fair, Cy-Woods, Cy-Creek, Klein, Klein Oak, Klein Collins and Tomball.
Some great neighborhoods to lookup on HAR.com, pick anyone of them, they're great:

Longwood in Cypress (my neighborhood)
Cypress
Longwood, Lakewood Oaks Estates, Wincrest Falls, Lakewood Glen, Rock Creek, Lakewood Forest, Coles Crossing, Secret Forest, Park Forest, Enchanted Valley Estates, Village Creek, Northpointe Forest, Stable Gate, Stablewood Farms, Villaggio, Northlake Forest, Lismore Lake, Tower Oaks, Lakes of Rosehill, Sydney Harbor, Reserve at Cypress Creek, Village of Indian Trails, Hunters Valley, Lakewood Crossing, Norchester, Fairfield, Lakes of Fairhaven, Mandolin, Lakewood Grove, Lakewood Trails, Gettysburg, La Paloma, Blackhorse, Bridgeland, Cypress Creek Ranch, Cypress Creek Lakes, Stone Gate, Canyon Lakes, Copper Lakes, Tuscany, Vintage Lakes Dozens more.

Champions (the original that started it all)
Champions
Champions, Champions South, Champion$ East, Champions West, Champion Forest, Huntwick, Champions Cove, Woods of Wimbledon, Wimbledon Champions, Highland Timbers, Falls at Champion Forest, Lakes of Sterling Gate, Edinburgh Estates, Champions Park North, Champion Woods, Champions Place, Estates at Windrush, Wimbledon Forest, Hamlet at Champions, Champions Centre Estates, Champions Bend, more.

Champion Forest

Gleannloch Farms
Spring/Klein
Gleannloch Farms, Memorial Creek, Willowick, Terranova West, Spring Creek Oaks, Windrose, Memorial Northwest, Glenn Haven Estates, Lakes of Cypress Forest, Bainbridge Estates, Estates at Creeks End, Country Lake Estates, Cypresswood, Thicket at Cypresswood, Cypresswood Glen, Shadow Creek, August Pines, Auburn Lake Estates, The Preserve, Northampton, many many more...big growth area.

Holly Creek Estates
Tomball
Holly Creek Estates, Timberlake Village, Villages of Northpointe, Spring Creek Estates, Northpointe Cove, Stonebridge Ranch and many more.