Those are the Must Haves along with a nice oring rebuild kit that will allow you to hand fit your orings. You want to be able to flick your wrist and have the bolt move with it still sealing. A god dow 33 will go a long way. Sl33K, Dye Lube, Monjey Poo, Lurker Lube. I have been using a mix of Monkey Poo and SL33K to good effect lately.
A good clamping feedneck and on off go a long way as well. Most shockers can be found with a Q lock and an on off of some sort for under $200 if your lucky it will even come with a freak barrel.
NXT Bodies have a different style VA were made out of a different aluminum and also utilize break beam eyes.
Their are two kinds of solenoids Parker and Humphery both are good but the Humphrey Noids have detachable upper boards and IIRC a slightly faster cycle time.
Depending on if you get a sealed or non sealed body you can use a "LP Can" Helps you lower your pressure a little bit, if your body is not sealed you should just use a stock sft can with the eigen bolt.
I highly recommend spending the money and hunting down a CCM Rip Frame as I think they are the most comfortable and the triggers are sexy as fuck.
Drop an Eigen and a virtue board inside an otherwise stock sft or nxt and you have a badass shooter. Fit the orings and set your dwell to 10 and your pressure to 160 and chrono to velocity. I have had good luck with that method. Getting about 1200 shots off of a 68 with a slight underbore.
IMO Stay away from any non stock SP bolt guides as the tolerances can be iffy especially with eigenbolts. Furthermore if you want a specific PL body be prepared to pay a premium depending on what you are looking for.
Here is a picture of my current build. Parts should be obvious aside from the virtue board and magnesium eigenbolt my word of advice is build your own it is much more rewarding that way. If you need any more info check out ZDSPBs tech section on the shocker has pictures of every different milling as well as descriptions of all the aftermarket parts available for them.
Also Predator47, AndrewTheWookie, and Soup I know love the shocker platform and I beleive Forrest built a shego recently as well. Another great resource is the Shocker Forum on Nation quite a few useful guys on there. Apollo, Anguish, GunHero, Kool Aide. Lots of cool peoples.