What kind of nailer should i use?

Hey everyone,

so i'm looking at making a few items based off of plans on this site.

http://ana-white.com/2009/11/plan-simple-cheap-and-easy-console.html
http://ana-white.com/2011/08/storage-bench

that reference using a nailer and i was wondering what kind of nailer? Are these generally just ok with brad/finish nailers? are those strong enough? The console table, it seems to be holding pieces for the legs and i was under the impression that brad nailers aren't too structurally sound so i figured i'd check...

and at which point, if it is a finish/brad nailer, does anyone have any thoughts on the ryobi cordless?

http://www.homedepot.com/p/Ryobi-18-Volt-One-18-Gauge-Cordless-2-in-Bra…

Thanks!