Which phone should I buy for running Replicant?

[Michael Spacefalcon]

Hello list,

I have a question: of the phone models that are currently supported by
Replicant, which would be the best one to get?  My budget is high
enough to where device cost is not a factor.  I have a comrade to whom
I'm trying to teach the moral principles of Free Software as outlined
so wonderfully by the FSF, with the emphasis on the Four Freedoms, and
our current frontier is the phone.  The comrade in question is an
absolutely wonderful person, but she is very very non-technical: her
skills and interests in life are elsewhere.  Hence her relation to
technology will always be as an end user and nothing more.  But I
believe that the fundamental moral principles outlined by the FSF
should apply to everyone, not just us computer science geeks, and it
is vitally important to bring Free Software to the non-technical end
users.

Of course the free-est phone ever made is Neo Freerunner by Openmoko,
and I have one - but remember that here I'm trying to reach out to a
very non-technical end user.  Whether the motherboard inside that Neo
case is a GTA02 or a GTA04, my target audience will *not* like that
case and that small (in comparison to the typical mass-produced
smartphones) resistive touchscreen - again, compare with the typical
mass-produced devices of today with large capacitive touchscreens, and
some with slide-out keyboards too.

So with the GTA02 and GTA04 not being viable options, we are left with
the repertoire of several mass-produced smartphones which are currently
supported by Replicant, and I'm probing the wisdom of this mailing list
to help me decide which of those I should buy on ebay.  Obviously all
of these devices are plagued by limited hardware support because of
undocumented hw, proprietary firmwares, etc.  Which model suffers the
least from these problems?

I'm looking specifically to run Replicant 4.0, not any of the older
versions - I need to make the best possible impression on my target
audience.  Of the devices currently supported by this Replicant
version, which would give the best user experience to an uninitiated
and totally non-technical end user?  Which would draw the least number
of disappointed curses from such a user?

TIA for any insight,
SF