<select
  ng-options="region for region in regions track by region"
  ng-model="displayConfig.region"
  >
</select>
<select
  ng-options="operatingSystem for operatingSystem in operatingSystems track by operatingSystem"
  ng-model="displayConfig.os"
  >
</select>
<table class='table'>
  <thead>
    <td>Instance Name</td>
    <td>Storage</td>
    <td>Total Storage Size</td>
    <td>Cost per hour</td>
  </thead>
  <tr
    ng-repeat="instance in instances |
      validInstances:displayConfig.region:displayConfig.os |
      orderInstances:displayConfig.region:displayConfig.os"
    instance="instance"
    display-config="displayConfig"
    >
  </tr>
</table>

<form class="form-inline">
  <select
    class="form-control"
    ng-options="region for region in regions track by region"
    ng-model="displayConfig.region"
    >
  </select>
  <select
    class="form-control"
    ng-options="operatingSystem for operatingSystem in operatingSystems track by operatingSystem"
    ng-model="displayConfig.os"
    >
  </select>
</form>

<table class='table'>
  <thead>
    <td>Instance Name</td>
    <td>Storage</td>
    <td>Total Storage Size</td>
    <td>Cost per hour</td>
  </thead>
  <tr
    ng-repeat="instance in instances |
      validInstances:displayConfig.region:displayConfig.os |
      orderInstances:displayConfig.region:displayConfig.os"
    instance="instance"
    display-config="displayConfig"
    >
  </tr>
</table>

Make the filter options more 'bootstrappy'
Make the filter options more 'bootstrappy'
