News for general G1a persons.
Before getting to your specific G1 subgroup, G1 in general today seems most common in Iran and the countries bordering it to the west. But G1 has spread out as far east as India, Siberia and China and west to western Europe. Late last year we learned from a study that there is pocket of G1 persons also in Armenia, similar to the G1 pocket of men found earlier in Kazakhstan. We only have limited information about these Armenian samples, but the Kazakh men have been in the G project and well tested. New studies also showed that G1 is otherwise rare in the Caucasus Mountains area north of Armenia.  It is unknown if the new Armenian samples might fall within G1a or not.
Your sample in the G project has provided valuable information. It is only by seeing as many samples as possible that new subgroups can be identified.
There are three types of general G1a persons
(1) Those only predicted G1a.   You have marker values very similar to persons who are confirmed G1a.
(2) Those confirmed G1a but not tested for all the subgroups (basically untested for marker DYS494)
(3) A small number of persons confirmed G1a who have been found negative for all the known G1a subgroups.
The general news for general G1a persons this year is actually the adding of a new, large subgroup within G1 designated for now as G1c. This is a very interesting new subgroup that consists so far both of Jewish men from n.e. Europe and Muslim men from the Middle East. This combination suggests G1c may have arisen in the Middle East before either of those religions existed.  The composition of G1c is quite diffrent from your G1a group which is splintered into very distinct subgroups with somewhat similar ethnic compositions. This may indicate G1a subgroups arose after modern religions and ethnic boundaries were more distinct.
If you have been confirmed as G1a - P20 + , it is incredibly inexpensive to determine if one belongs to all four known subgroups.  A marker oddity in the first 12 markers would have caused me to list you instead in one of two G1a subgroups (G1a2, G2a3), and you can be sure you do not belong to these two G1a subgroups.  In addition, the marker values of confirmed G1a1 men are so typical that it is not worthwhile testing for the SNPs that characterize it.  Since you do not have G1a1 marker values, I did not place you in that subgroup.  That leaves just one subgroup that will be undetermined for confirmed G1a men.  This is the G1a4 subgroup characterized by having a marker value oddity at marker DYS494.  This marker test has to be ordered specially, but only costs $7.20 US.  [In addition, if you have not had special testing before, they charge $9 for transferring the sample.]  So participants Labriola, Pool/Poole, Notghi, Manasseh and Miller really need to order DYS494. 
Those listed as predicted G1a -- participants Santos, Waheed, Phillipon, Hahn, as well as either Hazday or Hasday -- need confirmation that they are G1a.  This can be done by a simple $29 test for G1a (P20).  There is a high likelihood you are G1a based on your marker values, but I cannot guarantee this is your category.  If you should be negative for G1a, then the full deep clade test would be indicated, which is more expensive.
A special word for the Pool/Poole men listed as predicted G1a.  Someone from your surname group has tested positive for G1a so there is no need for you to test for G1a.  G1a is much older than your surname group and all will have the same SNP results.  I will continue to list you as only predicted G1, but there is no indicated for testing for G1a.
Our confirmed G1a men who are untested for all subgroups are really those who have not tested for just one subgroup -- the one defined by a marker value oddity at DYS494.  We strongly urge that they test for DYS494.  This is fairly inexpensive.
As mentioned in the general news section, if you are willing to better define your grouping, I will be glad to give individual recommendations and help. rayhbanks@cox.net.