Pronunciation of "quasi-"

Here's what I found in the LPD3, CPD17, and ODP (some irrelevant information omitted):

The Longman Pronunciation Dictionary (Wells 2008)

principal variant: ˈkweɪzaɪ

other variants: ˈkweɪs-, ˈkwɑːz-, ˈkwæz-, -i

The Cambridge Pronouncing Dictionary (Roach, Hartman, and Setter 2006):

UK: kweɪzaɪ, kwɑː-, -saɪ, -zi

US: kweɪsaɪ, -zaɪ; kwɑːzi, -si

Note: quasi- takes secondary stress on the first syllable, eg. quasi-stellar /ˌkweɪzaɪˈstelə/, US /-saɪˈstelɚ/

The Oxford Dictionary of Pronunciation for Current English (Upton, Kretzschmar, and Konopka 2003):

BR ˈkweɪzʌɪ, ˈkwɑːzi

AM ˈkwɑzi, ˈkweɪˌzaɪ

It's interesting to see how its pronunciation changed with time. For example, the eleventh edition of the Everyman's Pronouncing Dictionary (by Daniel Jones, 1956) gives the following:

quasi kwɑːzi [old-fashioned ˈkweisai]

However, in one of the earlier editions of the same dictionary - it was published under the title "An English Pronouncing Dictionary" in 1919 - there is only one variant listed:

quasi ˈkweisai

Now, I'm not a big fan of prescriptivism but here's what the Pocket Fowler's (2008) says:

"The recommended pronunciation is kway-ziy rather than kwah-zi."

I'm an American English speaker who uses this prefix on a daily basis (I'm a mathematician). I, and everyone else I know, say "kwah-zee".