with 1.5 months of when you want to move in is good. Most apartments are 1st come 1st serve, and they wont hold them open for you. Also check Templ Housing listings you may find something good in an area you didn't consider. I know Temple gets people to inspect the places that they allow on thier list.
I have dealt with Temple before. they are Nazis about protecting thier students. I'm moving to Carlisle PA. Plan to sign a lease in July for Aug 1. That gives me most of the month to fumagate/clean, move, and settle in. Hopefully I'll find a place that's a keeper for 3 years. Of course the market there is a little different.
I've personally shown the temple rep. who inspects the properties before they get added to the list and its a joke- they are basically just making sure the property isn't a crack den, seriously- he pretty much said that to me while he was there, so I wouldn't take the temple stamp of approval to mean all that much.
I'm relatively certain that they have jmh management on their list and every person I have met who has lived in one of that companies properties has had an awful experience filled with maintence problems. Which is really a shame because they have a lot of cheap properties in decent neighborhoods, but hey, I guess thats why they are so cheap.