I also collect handcuffs.
Handcuffs I got:
Hiatt chain link
Hiatt rigid speedcuffs
TCH840(uk police current issue speedcuffs for MOST forces)
TCH850 (folding rigid speedcuffs that lock when extended)
ASP pink chain linked
TCH842 look nice but just the same as TCH840 with keyholes on BOTH sides.
I got zaktool handcuff keys as the standard small keys are awful imo.