Seems to be a number of folks here quite happy with their $3K laminators. We run a Royal Sovereign, but it came with the printer. If I had to buy outright I'd get a $3K(or less) rig.
Bet if you took a US Tech and that Mistral and stripped them down to their bare components you'd find them shockingly similar.
I used to build industrial paper processing equipment and every bell, whistle and "added for ease of operation" trick is another point of failure.
As I've said before; Laminating is an art not science. You have to figure out what your rig wants.
It took a little while to figure out our RS, but we've done full rolls(150') with a 1/4" drift on our RS.(you'd die laughing if you saw my infeed set-up)