I would say buy what ever machine you desire , a 500 or so difference will soon be forgotton .
The alltec machine refered to might be the plastic Elite , Alltec could build this with electros , 2" connector , a built in inline heater ( and an immersion if u want ) for less that the Airflex ,id say .
But the Airflex u mentioned would be good so get that if u want , Enforcer ... is 2050+vat , not outrageous ? you could add the Amtech CFR 3kw external heater for 450 incl vat .