Index: /trunk/src/VBox/Frontends/VirtualBox/src/wizards/newvd/UIWizardNewVDPageBasic1.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/wizards/newvd/UIWizardNewVDPageBasic1.cpp	(revision 60635)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/wizards/newvd/UIWizardNewVDPageBasic1.cpp	(revision 60636)
@@ -41,5 +41,5 @@
 }
 
-void UIWizardNewVDPage1::addFormatButton(QWidget *pParent, QVBoxLayout *pFormatLayout, CMediumFormat medFormat)
+void UIWizardNewVDPage1::addFormatButton(QWidget *pParent, QVBoxLayout *pFormatLayout, CMediumFormat medFormat, bool fPreferred /* = false */)
 {
     /* Check that medium format supports creation: */
@@ -63,8 +63,18 @@
     /* Create/add corresponding radio-button: */
     QRadioButton *pFormatButton = new QRadioButton(pParent);
-    pFormatLayout->addWidget(pFormatButton);
-    m_formats << medFormat;
-    m_formatNames << medFormat.GetName();
-    m_pFormatButtonGroup->addButton(pFormatButton, m_formatNames.size() - 1);
+    AssertPtrReturnVoid(pFormatButton);
+    {
+        /* Make the preferred button font bold: */
+        if (fPreferred)
+        {
+            QFont font = pFormatButton->font();
+            font.setBold(true);
+            pFormatButton->setFont(font);
+        }
+        pFormatLayout->addWidget(pFormatButton);
+        m_formats << medFormat;
+        m_formatNames << medFormat.GetName();
+        m_pFormatButtonGroup->addButton(pFormatButton, m_formatNames.size() - 1);
+    }
 }
 
Index: /trunk/src/VBox/Frontends/VirtualBox/src/wizards/newvd/UIWizardNewVDPageBasic1.h
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/wizards/newvd/UIWizardNewVDPageBasic1.h	(revision 60635)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/wizards/newvd/UIWizardNewVDPageBasic1.h	(revision 60636)
@@ -41,5 +41,5 @@
 
     /* Helping stuff: */
-    void addFormatButton(QWidget *pParent, QVBoxLayout *pFormatsLayout, CMediumFormat medFormat);
+    void addFormatButton(QWidget *pParent, QVBoxLayout *pFormatsLayout, CMediumFormat medFormat, bool fPreferred = false);
 
     /* Stuff for 'mediumFormat' field: */
Index: /trunk/src/VBox/Frontends/VirtualBox/src/wizards/newvd/UIWizardNewVDPageExpert.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/wizards/newvd/UIWizardNewVDPageExpert.cpp	(revision 60635)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/wizards/newvd/UIWizardNewVDPageExpert.cpp	(revision 60636)
@@ -128,11 +128,12 @@
                         const CMediumFormat &medFormat = medFormats[i];
                         if (medFormat.GetName() == "VDI")
-                            addFormatButton(m_pFormatCnt, pFormatCntLayout, medFormat);
+                            addFormatButton(m_pFormatCnt, pFormatCntLayout, medFormat, true);
                     }
                     for (int i = 0; i < medFormats.size(); ++i)
                     {
                         const CMediumFormat &medFormat = medFormats[i];
+                        const QVector<KMediumFormatCapabilities> &capabilities = medFormat.GetCapabilities();
                         if (medFormat.GetName() != "VDI")
-                            addFormatButton(m_pFormatCnt, pFormatCntLayout, medFormat);
+                            addFormatButton(m_pFormatCnt, pFormatCntLayout, medFormat, capabilities.contains(KMediumFormatCapabilities_Preferred));
                     }
                     if (!m_pFormatButtonGroup->buttons().isEmpty())