Cadence components

First off I've noticed whenever you guys recommended component sets it's usually Focal, CDT, or Diamond. Well on eBay they have a Cadence 6.5" set for $79 and a Cadence 5.25" set for $59. I know Cadence is highly recommended but does that count for components as well?

Also, I've done a small search and can't really find exactly what benefits(or negatives) larger speakers have over smaller ones. Both sets are the same RMS(100) and come with the same stuff, so which would be a better deal if they both perform equally well?

You can also get them from www.cadencesound.com for the exact same price, free shipping.