Jeff, there are some things missing from your description....
2 hours of live/full volume direct comparison trial of heads:
AH150 MkV
AH200 Ser 6
AH250 Mk2
AH250 MkV
Through cabs individually and as stacks:
Trace 410Mk2
Trace 410H Ser 6
Trace 15+10 Ser 6
Trace 1x15 MkV
Trace 15+18 Mk1
And to confirm tonality preference:
Hartke USA 410
Marshall Jubilee 1x15
And to confirm stack is reequired:
AH150 Mk2 1x15 combo with/without extension cab
In every combination for two hours.
Throwing in a Premium ++ grade XLR-XLR and Jack-Jack speaker leads.
Then, pull a Mk2 1x15 to match the favoured 410. Finding a problem with the driver, replace with an original replacement Fane 200 and bring the cab to town in time for a trial.
[i]Now[/i] let's see...
MkV AH250 with footswitch and silent fan and working UV unit (full tech checkup 2 weeks ago)
Matched cab stack - clean/just a few knocks and the usual logo scrapes black painted solid ply with orig 50w Celestion 10"s and Fane 15" - try to find one of those, let alone a stack
With top grade leads
And promising solid tech support in the event of anything emerging in the first wee while of ownership.
And letting you have it for a full rehearsal with no deposit.
And allowing swap back and full trade in if you change your mind on amp or cab based on the prices discussed.
And paying by cheque.
All in all, a milk 'n honey tone powerhouse dark chocolate thunderstack that you personally chose in preference to some of the stuff you have listed in your brief.