The Galil is actually a hybridized AKM, it incorporates elements of Stoners AR15/AR180 also. The AK cadillac is probably the Valmet.
The AUG and French FAMAS, along with the SA80, are the only other bullpups adopted by major armies, of the three only the AUG has been successfully exported.
Interestingly I've heard little about this rifle in the small arms press, it's been developed quietly.
M4 MWS or SOPMOD is a more flexible choice but perhaps this rifle will be successful.
The IDF is generally intolerant of crap, apparently unlike the UK MOD.
My pick would go to the French FAMAS G2. The Steyr has had some problems, particularly in sandy/desert climes, and the difficulties the Australians had with their F88 version, though now largely worked out, are another reason for dropping the AUG a few points.
The French Paras, Foreign Legion and Marsouins have been very happy with their FI versions, known as *Le Clarion* [the bugle] due to its approximate shape, and it's been combat proven in the Gulf War, Somalia, Bosnia and Afghanistan...among other things. The primary complaint is that it's a bit unwieldly with an M203 grenade launcher fitted beneath, a trait shared with most other military bullpup rifles, which will likely require a purpose-built or integral UGL design.
The Israeli Tavor, offered to the Serbs and Turks as well, may be the equal of the Clarion, but is probably not significantly *better.* We'll see.