If you are debating on it, then you will regret not getting a car with HUD. HUD is one of the technologies that defined the high tech of M5s. And it's not something that's easy to retrofit.
That being said...I love my car and it doesn't have the HUD and the active seats and I personally don't miss them at all. My co-worker has the HUD on his M5 and considers it a gimmick. It has an amazing V10 which steals the show and that's all that matters. Full red leather/alcantara headliner and comfort access make the car seem plenty luxurious and high tech. I like not having to lock and unlock, for me it's more the technology than the convenience that's cool.
I missed the HUD only once since I had my car and that was on a smaller closed course (during a BMW CCA Winter Car Control Clinic). I bought the car a few months ago, so I wasn't good at judging when to shift perfectly since I couldn't see the rev limiter while 'in action'. Still, not something I miss too much, you learn quickly the engine sounds and when to shift.
What I do regret a little is that iDrive is so slow on the older cars. I am assuming the 2010 iDrive is a bit faster with HDD. It's the slowest interface with the fastest car - makes-a-no sense.
Oh my god, are you nuts. You she off the DCS in an M5!!!
Seriously I never look at the rev counter but I do like the warning that pops up to remind me I have exceeded my preset speed limit of 80mph. Keep me in check.
HUD does not display the gear on a 6 speed but I dont need it to, I know what gear I'm in.
__________________ 2007 Silver Grey 6 speed
Dinan S3 Suspension, Dinan 19" lightweight Forged Wheels, Dinan Mufflers.......
I don't mention things that don't make the car go faster or handle better. 50 line sigs kill me.
Current: 2008 e60 DINAN ///M5 Interlagos Blue SMG
DINAN 3.91 Differential, Stage 2 Suspension, Free-flow exhaust, Stage III Software, Front strut braces,
High Flow Air mass meters and intakes, 13% Underdrive pulley, RPI Scoops.
I'm a huge fan of the HUD. Heck, that's probably one of the most important features that I wanted for my purchase. I don't use it for the navigation purpose like some other board members do. Mainly for the speed and rpm.
BMWpedals ///M pedals, Valentine 1 Radar/Laser detector hardwired, Dension 500 Gateway and Specdock Iphone Dock, Black BMW steering wheel emblem, Bavarian Soundwerks BSW Stage 1 speaker upgrade, Trinity Autosport Interior LED lighting, Formula 1 Pinnacle Tint
DINAN badge (matte black), Matte Black Front Grill, Matte Black Side Grills, Matte Black ///M Badge, MTECH V3 High Powered LED Angel Eyes, Trinity AutoSport Smoked LED Side Markers, Trinity AutoSport Black BMW Roundels and wheel caps, WeissLicht Xenon LED License Plate lights, Bumper Plugs, H&R Track Plus spacers, ///M valve stem caps
DINAN 3.91 Limited Slip Differential, DINAN Stage III Engine Performance Software, DINAN Stage II Suspension System, DINAN High Flow Middle Racing Exhaust with 3.5" resonators (secondary cat delete), DINAN Free Flow Exhaust (matte black tips), DINAN High Flow Air Mass Meter/Intakes, DINAN Carbon Fiber Rear Shock Tower Brace, Sprint booster V2, Hawk HPS Brake Pads, Stoptech Stainless Steel Brake Lines, EvoSport Power Performance Pulley, RPi SVI Oil Cooler, RPi Ram Air Induction Scoops (black), OEM charcoal filter delete, Track four wheel alignment to DINAN Stage II suspension specs, Michelin Pilot Sport 2s
BMW Personalization Coding
Removed seatbelt chime, close windows with comfort access, disable Idrive disclaimer, fold mirrors with comfort access, fuel reserve warning 1/8th tank, removed speed correction factor, amber corner eyes delete, close windows with FOB, digital speedometer, fold mirrors with FOB, turn signals in HUD, Euro Flash-To-Pass (Xenon)