Actually what I am thinking of is after deducting where the RM 15K go to, I think the amount we are spending on those gadgets that GL may not have, it may be good investment if we have the extra money for Hi-Spec Sedan M3...
Trade in 16" for 18" rim & tyre - deducted RM 4K (may be)
Leather seats instead of fabric - deducted RM 2K
Add DRL - deducted RM 1K (may be)
Bi-Xenon with Auto Leveling headlight instead of Halogen - deducted RM 2K (may be)
Balance RM 6K go the rest extra features may comes about RM 800/feature,
As all everyone said loud and clear, if extra penny is not an issue, why not?
Furthermore, those items all covered by warranty and insurance (in case of accident or theft) if anything happen to your ride.
The only HS feature you can add to GL by the official SC is navigation for RM600. All other additions have to be done buy 3rd party and potentially void your warranty.
Also note that all aftermarket HID kits are illegal and they don't come with auto levelling. Adding DRL is not RM1K. Few hundred can kaw tim.
The leather seat for GL is already included but some SA offer an extra RM2K discount if you want fabric seats.