Alpine iXA-W404r Double Din Headunit or swap in double din ?

USB Connection USB Cable (USB Cable + I/F Connector for iPod®) Included Dedicated iPod® Source Compatibility for iPod®: iPod® 5th generation, iPod® nano 1st/2nd/3rd/4th generation, iPod® classic, iPod® touch 1st/2nd generation Works with iPhone M.I.X. (Shuffle) Capability: Song, Albums, All Music Control: Song Up / Down / Repeat Video: Video Search, Video Playback Available Selections: Playlist, Artist, Album, Song, Podcast, Genre, Composer, Audiobook Percentage Search: Percentage Search Alphabet Search: Alphabet Search Information Display: Album Art, Song (Title, Album) Easy Navigating: Quick Search with Double-Action Encoder and Back Button USB Media Connection USB Connection: USB Cable Included Music Playback: MP3/AAC/WMA Playback USB Video Playback Ready (KCE-635UB Required) Sound Tuning Subwoofer Level Adjustment High Pass Filter Adjustment Bass Level Adjustment Bass Center Frequency Adjustment Bass Width: Q Adjustment Treble Level Adjustment Treble Center Frequency Adjustment Loudness: Loudness Feature MultEQ Ready (PXA-H100 Required) MediaXpander Ready (PXA-H100 Required) 6 Channel Time Correction Ready (PXA-H100 Required) 5 Band Graphic / 7 Band Parametric Equalizer Ready (PXA-H100 Required) Crossover Ready (PXA-H100 Required) CD Changer Control M.I.X.: One/All (Shuffle) Multi-Changer Control including MP3 Changer CHA-S634 (with KCA-410C) Music Text Information: CD:Text Scroll Display, MP3: Text Information Display (ID3 Tag) Music Control: Play/Pause/Forward/Backward Repeat: Song/Disc General Power Output: 4 x 50 W High Power Amplifier CD Changer Control Display: 4.3′′ QVGA Monitor Control Type: Double-Action Encoder and Touch Screen Face Color: Black Illumination Buttons: White Illuminated Buttons PreOut: 3 PreOuts (2 V) Selectable Power Input 2 PreIn (Front / Rear) 24-Bit DAC iPersonalized: Wallpaper download AUX-In: AUX IN (OFF / ON, Adjusting the AUX name) and Full Speed AUX+ In (KCE-237B Required) Steering Wheel Control Ready OEM Sub-display Ready Bass & Treble Controls Fader & Balance Controls Dimmer Input Power Antenna Output Amplifier Remote Turn-On Output Audio Interrupt Input Remote Control Ready NAVI RGB Input (ON / OFF) Camera IN (OFF / DIRECT / RCA) Multi Information Display: Calender, World Clock, Calculator, Audio Control, Audio Infomation Dual Zone Control: Visual EQ: (OFF / Night M. / Soft / Sharp / Contrast) Black Richness: (OFF / 5 steps) Tuner Memory Presets: Preset Stations (FM:12 / MW:6 / LW:6) Memory: Auto Memory Seek Mode: Local / DX Selection RDS Functions: TA, TP, PTY, NEWS, RADIO TEXT