We have a Jv33 and love it. It's a work horse. Lots of people on here have the JV3 and Jv33 is a great upgrade from the Jv3. It does awesome color. Very bright with ss21 inks. Capable of 1440 x 1440 resolution if you need it. JV33 CANNOT print lower resolution than 540x720.
I've not heard anyone really talk about the Seiko printers on here, especially the V-64. from looking at the specs it looks pretty comparable. Looks about the same speed.
I can tell you we'll be looking very hard at a Seiko H-74s or H-104s for our next printer.
Depends on what your printing.