Decompression cam question

I am looking for auto decompression on my 02 426 and am wondering what the best way to go is. Do I (1) buy an aftermarket exhaust cam (2) but aftermarket exhaust and intake cams or (3) buy the 03 exhaust cam. I am not overly concerned with performance gains I just want the decomp feature.

Using the OEM 450 cam is the least expensive route, and many feel that the Yamaha cam, used with the original 426 intake, gives better performance over a wider range than using an aftermarket exhaust cam by itself. The downside: very slightly complicated, non-standard timing process.

Aftermarket cams install and time by the marks exactly as do the stock cams, but they seem to work best in pairs, and they cost more.

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