Hi,
As was said previously, I wouldnt start off with any African Naja. The olny ones that are manageable spit and I dont feel spitters are a good first cobra at all for obvious reasons.
Regarding Aspidelaps, or should I say regarding Aspidelaps lubricus ssp (Aspidelaps scutatus in no way shape or form resemble Naja. The act more like a hognose snake then anything else)these guys are not good at all for cobra experince. Though they give ya a hood occasionly, they are extreamly small and about the biggest bluffers the world has evers seen!!! They also tend to strike more like a tiger snake or somthing from oz. My Aspidelaps lubricus lubricus form a weird hooded s necked stance, that is slightly elevated and not really too cobra like. Though they do do the typical stance from time to time, A.l.infuscatus is much more reliable for this. Anyway, yeah, their not to good for prepareing ya. Their to small to practise hooking and tailing (though I employ this method on all of my adults)and arent likely to stand their ground. They tend to flee more then anything else and most Naja will do the oppisite when pressed in close corners (Especially Naja haje, annulifera and melenoluca)
If I had to pick a sp or 2 I would probally recomend either Naja naja or Naja kaouthia. These guys dont spit (kaouthia has a slight ability to do so but I have yet to see it in any of mine)and generaly stand their ground as opposed to chargeing or spitting. They will give ya a run for your money from time to time but generaly just hood up and try to bluff ya down. The trade off hear in toxcicty. These guys may be more easy to handle but are easily some of the hottest Naja sp. Both have venoms which contain hemos and neuros and can really screw you up or even kill ya!
Now with all that being said, the best first Naja is still somone elses. Getting one without proper experince, like certin others I know, is not a wise move and is stupid IMHO. They really are a different beast and one should have atleast some supervised handleing experince before purchaseing one of their own.
Welp, I hope this helps ya out. BTW, ignore what was said in other post regarding Naja siamensis. Though they do average kinda smallish, compared to Africans I guess, they cane get pover 6ft and some individuals spit like theres no tomorrow!! My freind has a female that will fly up to the glass of its cage when you walk by and start nawing and spitting at teh same time trying to kill you!!! Others just stand their ground like a staionary water hose. Their venom is similar to the other Asiatic cobras I mentioned and these guy just dont make good starters. Also, most of the smaller Asian spitters are the same. Very runny, bitey and spitty in my experince, especially N.sumatra!!! N.sputatrix can be kinda laid back but again, some get nutts. Its better off that you have somthing that wont shoot you in the eyes first.
Best of luck in your quest,
Jeremy
P.S The one thing in captivity that makes Naja sp so freaken dangerous is their feeding response!! Some sp, notoriously N.nigricolis and N.haje/annulifera come flying out after any movment when they smell food in the room and many keepers freinds of mine have had specimens chase them several feet before they relized humans wernt food. Kaouthia can be horrible as well. Actually, they are all extreamly dangerous in this regard so be forwarned!!!

