So would that mean I have to worry about reactivity or no? What about chipping?
With all the Watanabe recommendations I think it may be my best option. Is it possible to swap the plastic part of the handle out for bone or will Watanabe not do that?
I wouldn't pay full price for Shun. The few Shuns I have were acquired at half price at most. If you're set on a Shun Premier nakiri I'd scan eBay and Google regularly to see if any pop up for sale.
Carter nakiris are great but the problem isn't just the price, it's that he makes very few of them and when they come up they sell out almost immediately. You'd have to get on the mailing list and wait patiently, checking your email diligently, for months and months, to see if a stainless or high grade nakiri is available.
I have a Watanabe pro 180mm and it's a lotta knife. In contrast the Shun Premier at 5 1/2 inches is ~139mm. You'd want a smaller Watanabe. Fortunately he also makes pro nakiris in 120mm, 150mm, and 165mm. The ordering process is fairly simple. Go to
http://www.kitchen-knife.jp/ and click around and research the various offerings. Then email Shinichi on the site's email function with any questions (size, weight, materials used, options). When you decide ask him to send you a PayPal invoice. Painless. For example, I asked to switch the plastic ferrule to buffalo horn for an extra 7000 yen. It got to NYC within 6 days. The exchange rate from yen to dollars right now is good.
You might want to look into Masakage nakiris, I've been reading good things. If edge retention is your priority then Gihei makes a HAP40 steel nakiri that's available at
http://www.japanesechef.com.au/gihei.html (that's Aussie dollars and they ship to the US). Gihei Hap40 sold out on another websitethatshallnotbenamed within hours after being out-of-stock since last year. Or, you could try a Tojiro DP nakiri. Cheap as hell ($50 on Amazon), decent steel (VG10 same as the Shun), stainless, western handle. You can abuse it all you want, learn to sharpen on a whetstone with it (look into a 1000/6000 large dual King on epicedge.com), and just see if you even like the nakiri shape before moving on to an upgrade. In fact, I'd look into Tojiro DP as a general upgrade to all your Victorinix knives.