DX4 Heads.
I don't have experience with them, however, all their parts are original Epson sealed parts, so you won't have any problem.
As for the 10,600 head unit, yes, i always buy the 3 heads together and switch the manifolds to solvent.
Steve
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12 Summa Plotters
11 Roland Printers
10 Mutoh Falcons
9 Sharp Scalpels
8 Staff a Signing.
7 Vinyl Rolls
6 Gerber Printers
5 Gold Squeegues
4 Foamex Panels
3 Metre Rulers
2 Chalk-Lines
and a Partridge in a pear tree.