It is definitely A1200 as the perfect mix of portability, expandability, and built-in features. Followed by the A500 for sentimental reasons, and A1000 for being the first (but very limited in expandability). Back in the day, I was considering installing A600 motherboard into A1000 case with port extenders to avoid modifying the back panel (this was before 3D printers were commonly available).
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