I went for the connect 230lx as it has 900kg payload. But then there are 2 of us with a 500ltr tank (one does outsides, one does insides so 500ltr is enough)
My "dream van" would be the vw caddy (04 shape) but payload is just over 800kg. Ideal for 1, not for 2.
I went for the 90hp version of the connect. It pulls really well, even fully loaded. makes the drive so much nicer.
you would survive with 600 payload but I agree with the others . . if you can, go for more . . it's worth it as you never know what new jobs you'll end up getting. If you're gonna fit a system in it, you don't want to be pulling it out and fitting it into a bigger van in 6 months time when you get that big job you've always wanted !!
Berlingo and peugeot I think both do an 800 payload. So does the vw caddy. Ford connect 220 has 825 payload or 230 has 900. So, plenty of choice out there