IMO the only reasons to get a combo machine is space and/or budget. That said the 8" DJ you listed is IMO too small for your budget and for me a planer wider than 15" needs segmented infeed rollers to take full advantage of the width. Of your listed choices the Felder would be my choice but I would likely use the budget in a different way with a 12" jointer and 15-20" planer.
Of all the laws Brandolini's may be the most universally true.
Deep thought for the day:
Your bandsaw weighs more when you leave the spring compressed instead of relieving the tension.