Sorry for my late responding, I've benn busy.
Well, what I wanted to say with F-18 M is that in Spanish Air Force that "M" means they're modernized, in fact in Spain those F-18's are called C-15 M

The "M" is just a Spanish nomenclature.
Yes, people here is right, our F-18's weren't equiped with the new APG-73, but they have other important upgrades.
This is what I could find, I don't think you understand Spanish so I'll try to translate them into English. The MLU was:
* New Tactical Computer TPAC with a high speed multiprocessor, 6 1553 buses along the wings, 4 digital graphic channels and new asociated software.
* New HUD
* 2 new colour multifunction screens with high definition.
* Digital tactical maps system.
* MUFC multifunction screen of frontal control.
* Digital colour camera video (for debriefings).
* CIT, Combined Interrogator and Transponder, of INDRA.
* EGI, Embed GPS and Inertial System (GPS and INS integrated) AN/ASN-172
* Filters for FM VOR/ILS inmunity
* Installation of MIDS (Firstly it was "pre-installed", but it was succesfully installed in 2009)
* Integration of AMRAAM, IRIS-T and Meteor.
* ARC-210 Have Quick II radio with anti-jamming.
* Outdoor and Indoor cockpit ilumination, compatible with night vision goggles.
* IDM, improved data modem (a low capacity data-link for text message exchanging or target image sendig without breaking radio silence)
Despite this MLU there were done other upgrades:
* "Alertador" (in English? -
Radar Warning Receiver) INDRA ALR-400
* "Dispensadores" (in English? -
Counter measure dispensers - flare/chaff) AN/ALE-47
* SQ-600, a precise localization system of emissions.
* ALQ-500 perturber.
* Integration of Paveway III bomb
* Integration of BPG-2000 bomb.
* Integration of Taurus missile.
* 22 "barquillas" (in English? -
targetting pods) Litening II and 4 Reccelite (They will be upgraded Litening III with the IR sensor).
These upgrades were done in 67 aircrafts of 91.
I think the other 24 aircrafts have other minor upgrades, but I don't have information about it. Those 24 F-18 are in the Canary Islands.
Talking about the number of EF-2000 the 16 options haven't been rejected, so it's very possible they come. (In fact they will come, count 103 EF-200).
Cheers
