first orchid show this weekend--advice??

[orchidsarefun]

ditto much of the above but for me the best advice is to only buy orchids that would suit your growing conditions. Ask the vendors if unsure. Tell them about your grow area and lighting/temps and ask for tips.
Most Miltoniopsis have fantastic, fragrant and huge flowers - but are very finicky regarding max temperatures they can do well at. A newbie should keep away from species phals too as they are also finicky in general.

But you can also have a what the heck attitude and buy all those you like and sort out cultural requirements later