i have a janome gold, which is my traveling machine. very lightweight, has the features you're looking for (not sure about the presser foot pressure - but you *could* do that manually on a quilt - quilt basis by adjusting the height.)
schlepped it around for years in a bouncing van, left it in a damp beach house over the winter, dragged it from one vacation to another... never had one day's problem with it. still use it as a traveler. terrific machine.
i also have a janome mc8000. almost what? 20 yrs old? love it to death. no problems with it. only problems with me (don't sew your fingers together LOL)
so i think any janome you choose, any price range, will give you good service for a long time. IMHO