Very nice, Mr.Green! I believe they are mostly intermediate to cool growers, so I'm not sure what to tell you about keeping them in your area. Hope someone with more experience can give you better advice.
1st one is a Zygopetalum hybrid, second one looks like an Odontoglossum hybrid, third one is a Miltoniopsis hybrid and last one seems to be Beallara Tahoma Green (or similar). They all enjoy intermediate to cool environment. Keep them reasonably bright but no direct sun as they all have rather thin leaves that burn easily. good luck!