Most tournaments are usually 5 raid. If you are planning on playing in campaign fights, you will need a lot more. I have about 12 or so battle worth of EA with more coming. I have enough ISA to fight about 8 or 9 War. Plus I have just picked up a smattering of Centauri figs, 1 Octurian, 3 Primus, 4 Dargan, a Centurian, a corvan, about 6-8 Vorchans, Some Havens, and a couple of Kutai. Their low on my painting list right now.
My EA Fleet is:
3 Orestes
2-3 Avengers
6 Hyperions
3 Olympus
3 Oracle
2 Sag
12 Tethys
with 4 Omegas and 4 Novas on the way.
They are all FA Scale. I am going to use the Tethys as Hermes for now.
I have a full boxset of ISA Plus a few extra whitestars, a WS Gunship that I was planning on using as a WS 2, and a couple of allied ships to go with them.
The Early EA is a pretty decent fleet, and I would consider them for tournament play if the Tiger Starfury wasn't so weak.
Dave