diff --git a/rest_framework/renderers.py b/rest_framework/renderers.py
index 96c5e170b..5bc5d5f8e 100644
--- a/rest_framework/renderers.py
+++ b/rest_framework/renderers.py
@@ -247,7 +247,7 @@ class DocumentingHTMLRenderer(BaseRenderer):
             serializers.EmailField: forms.EmailField,
             serializers.CharField: forms.CharField,
             serializers.BooleanField: forms.BooleanField,
-            serializers.PrimaryKeyRelatedField: forms.ChoiceField,
+            serializers.PrimaryKeyRelatedField: forms.ModelChoiceField,
             serializers.ManyPrimaryKeyRelatedField: forms.ModelMultipleChoiceField
         }
 
diff --git a/rest_framework/templates/rest_framework/base.html b/rest_framework/templates/rest_framework/base.html
index bc6c2e4ac..a5e089429 100644
--- a/rest_framework/templates/rest_framework/base.html
+++ b/rest_framework/templates/rest_framework/base.html
@@ -132,7 +132,7 @@
                                 <div class="control-group {% if field.errors %}error{% endif %}">
                                     {{ field.label_tag|add_class:"control-label" }}
                                     <div class="controls">
-                                        {{ field|add_class:"input-xxlarge" }}
+                                        {{ field|add_class:"input-xlarge" }}
                                         <span class="help-inline">{{ field.help_text }}</span>
                                         {{ field.errors|add_class:"help-block" }}
                                     </div>
@@ -158,7 +158,7 @@
                                 <div class="control-group {% if field.errors %}error{% endif %}">
                                     {{ field.label_tag|add_class:"control-label" }}
                                     <div class="controls">
-                                        {{ field|add_class:"input-xxlarge" }}
+                                        {{ field|add_class:"input-xlarge" }}
                                         <span class='help-inline'>{{ field.help_text }}</span>
                                         {{ field.errors|add_class:"help-block" }}
                                     </div>