i have the sports pullover in white and while it is amazingly comfortable i'd say it doesn't flatten as much as the tri top does, but it redistributes everything nicely if that makes sense, when the tri top just squeezes and squishes and leaves weird lumps. the high performance binder - i have the short version of it and it binds really well but i had to get the shoulder straps shortened and i heard of one other guy with the same problem. the 2nd link you posted....while i don't own this binder it looks similar to another double binder i got which doesn't bind well at all.
are you sure you want a long binder though? i found the long binders with velcro to be rather weird,,,,,because the velcro is only where the binding section is, and often times you'll have an opening right under the velcro section