Andrew,
Well, since the requirement is only for an MP3 capable HU, it wud pay to shop around a little. I've nothing against the chaps at Brothers .... but I'd take my biz to some decent shops like KF, Klasse or Sound Quest. Granted that you're not planning spend a few thousands for this upgrade but if you want quality job and decent prices, then head on down to a shop that atleast know what they're doing. I think you'll find a number of decent HU from Eclipse, Alpine, Pioneer that meets your requirement / budget ... look at Sony and Kenwood too if you'd like a bit more bling in terms of design etc.
If you buy the HU elsewhere, then an installation fee of RM 50.00 or so would probably apply. But why take the hassle unless the difference in pricing is a couple of hundred bucks or more. Plus, even if something goes wrong you can always go back to the installer and ask them to get it sorted out.
Ah Lian, how your ol Naka gal doing ?
Cheers,
P.S - The majority of the mainstream manufacturers ... be it Japanese or Americans and Europeans have moved their manufacturing activities to China and other low cost areas. Granted that their upper end models are still manufactured in Japan, EU or US ( very little ) but it most cases, you get what you pay for. Unless we're talking about some real serious stuffs from McIntosh, Zapco, Arc, Genesis, Brax/Helix, Phass, Sinfoni and the likes.
Cheers,