AFS heads come ready to use out of the box with factory loops at both ends and are not intended to be cut or tuned. The front tapers are relatively fine so I'd assume they would make for nice, delicate presentations.
Vision ACE heads come in a variety of lengths and sizes, again intended to be used out of the box and uncut, however you will have to add your own loops.
Guideline Power Taper shooting heads come in 44' lengths are they are intended to be cut to suit your rod. As a result, they do not have loops. PT heads have powerful front tapers so they are better suited to wind, turning over Polyleaders, or large flies. My website has information on tuning PT heads and making loops.
Loop and Scierra also offer shooting heads, however, I'm less familiar with their current offerings.
Beulah and Snowbee offer shooting heads with built-in running lines if you want to go that route. I've tried both and they each cast very nicely.
We're fortunate these days to have a range of excellent shooting heads that will serve a range of purposes.
One caution, Rio
AFS heads seem to be one size heavier than the Scandinavian versions, so a Rio
7/8 would be roughly equivalent to a Vision ACE 8/9. I tested an AFS 7/8 on my Guideline LeCie 8/9 rod and the load was bang-on.