Decks, Patios, Porches and Docks - Surface-mount 6x6 post: which bolt to use?

A follow up to a recent post. I have decided to surface-mount a 6x6 cedar newel post in my porch steps. After some research, I am going to drill the existing concrete and stone fascia, use epoxy, and push a all-threated 5/8 bolt, leaving about an inch exposed to insert a ABU66Z simpson strong-tie post anchor, then attach the post. I am planning to use 6-inch bolts.

Question: which bolt to use? I could use a all-stainless-steel (non-magnetized) bolt, but they are not easily available and are pricey (and might have to buy a 3foot online and cut).

I could use a stainless-steel-PLATED bolt (magnetized), which are more readily available in 1-foot lengths, but I am afraid they may rust.

I can buy hot dipped galvanized bolts (like this one)
Amazon.com: Steel Hot Dip Galvanized Ultrawedge Anchor 5/8-11" Diameter x 8 1/2" Length (Pack of 10): Industrial & Scientific (http://www.amazon.com/Galvanized-Ultrawedge-Anchor-Diameter-Length/dp/B00137S736/ref=sr_1_17?ie=UTF8&s=industrial&qid=1257026362&sr=1-17)
but I am afraid they may rust or not be appropriate for the job.

Or I can buy a J-bolt, 8-inch, hot dipped galvanized, and cut the lower part of the "J" (as this is not fresh concrete). But I am afraid it may rust and not hold as firm, as it is not all-threated.

Am I worrying too much about rust?

Thanks

In a word....yes. Of all the decks built using hot dipped galvanized bolts, I believe you will fall in the average non-failure section. The ultrawedges are great, but using epoxy in addition may help.

Like Larry said, you're worrying too much about rust. The bolt will outlast the wood.

I would go with the hot-dipped ultrawedge and epoxy it in. If the railing will be attached to the post(s), attach it to the stair stringers as well.