Well, looks like most of the people are concerned about cost of parts, but do you really need parts on daily basis? Routine maintenance is Oil/Filter change and you can use those available in open market.
Brother, go for something that is comfortable and pleasure to ride. I've owned an Alto (2003 model) and now own Chevrolet Exclusive model that I purchased in 2005. I know the difference. I have driven it frequently on inter-city highway and believe me it's a "joy" to ride. Superb syspension, road grip, roomy interior and a very efficient Air Conditioner. No issues and only parts changed so far are the belts and spark plugs apart from routine oil/filter change (the ODO is now around 35000 Km).
My brother owns 2008 Alto and it's just pathetic. It's simply a rip off! Something wrong with some part pretty frequently!
PS: Don't go for new Chevrolet Spark, it's expensive and has the same 800cc engine as in Chevrolet Exclusive.