What band and what is required depends on whether you want to actually hear and work stations or have a computer do it. 1296MHz is by far the most active band for CW/SSB EME.
Unfortunately, it takes some design skill to put together a station at 23cM- the feedhorn is a bit complex and requires ideally a scalar network analyzer to align. The advantage is though that because we use circular polarity, we are not bothered by Faraday rotation that can lock you out for hours on 144 or 432.
My 1st 23cM EME station was homebrew 500W water cooled TX and a 12' dish. A number of stations were solid copy even on SSB. I am now running a 15' dish and 300W solid state at the dish (soon to be 600W) and can reliably ragchew on CW/SSB.
At the other end of the spectrum are the guys using JT modes and the Logger to make contacts- most times, nothing is heard and the QSO would not take place without real time scheduling via the internet. One EME friend of mine in New England received two QSL cards confirming 2M EME QSO's via JT65- my friend was not even on 2M EME. For an explaination of how this happens, see: http://www.sm2cew.com/jt65.html
So, you pay your money and make your choices...
Hearing your own lunar echoes is a thrill in itself.