Doesn't battery life concern you? Maybe you need to get battery life more if you are doing presentation on-the-go, so the above 2 model might not enough juice for you last for a day.
Nexus 10 have 2GB RAM, only lag when play high graphic display Games, watch movie, surfing website, reading news won't make you lag. Nexus 10 is the best Android tablet of 2012. Don't forget Nexus is Pure Android, while Asus only with 1GB RAM only. To be honest, I prefer to get 2GB RAM at least for Android tablet/smartphone even on KitKat/JellyBean.

Lastly, OEM like Asus/Sony have bloatware in their device, so if they only preload with 1GB RAM, get ready to be lag on everything. So if you buy OEM device in the future, make sure at least 2GB or even 3GB above RAM.

Since you can wait, let's just see the next HTC rumor Nexus tablet.
Whats your budget and usage anyway? is not the matter of worth buying or not..

For ori your price hard to get.

Bigger screen does matter, try the Asus MeMoPad 8.

Can..other model available.

u looking for ori or ap??

Ori set hard.. see ur brand..