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I nearly started with a Razor, and I do now have three Duckys too!
If you're going for RealForce and HHKB, unless you have a good reason to get otherwise consider getting a 55g RealForce for contrast with the HHKB. OTOH if you really do prefer lighter switches, consider the 45g RealForce, but general consensus is that 55g is the perfect Topre weight.