So, the local conservatory will soon be selling off all of its orchids from the "Orchid Forest" show that's been going on and I want to snag a few good ones if possible. Right now I have 3 phals and I would like to try out some new species (I'm building a light table too...I posted that topic under lighting

)
From what I remember, they have cattleyas, odontoglossum, oncidiums, dendrobiums, phalaenopsis, and some spider varieties (not sure exactly which ones).
I'm the most interested in the odontoglossums and dendrobiums...would these be good beginner species? The book I've been reading (Understanding Orchids by Will Cullina) says the odontoglossums are "expert" level orchids, but some sites online says they are easy to care for, even for beginners...confusion! There was an orchid at the show that looks a lot like odontoglossum violetta (google image it) but has a deep indigo lip instead of magenta...I was hoping to get that one if it's an appropriate species for beginners.
Any suggestions?