Got the Infinity 3032's installed in the dash corners. They are definitely better than the stock HK speakers (crisper, better imaging) but I honestly can't say it's an amazing difference like others who've upgraded the Alpine or basic systems. I assume that's due to the "better" HK standard speakers. I was also surprised what they looked like as I've not seen a picture of one posted yet. Here is what the stock HK dash corners look like:
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For one thing the magnet is far smaller than the Alpine speakers. Overall I'd say do it if you want better sound but just don't expect a huge difference due to the two way speaker that's standard.