Thermarest hands down !
Cheap model - Ridgerest very light and comfortable but a bit bulky.
Regular Long - I've had mine for must be close to 20 years, it's super comfortable and compact, it was a factory second or "irregular" with slightly off colour, has functioned perfectly although I've found lately it doesn't fully self-inflate and requires half a dozen breaths to get it up to size. Great when paired up with a Ridgerest for winter camping. I think it is now called the "Trail" model.
Prolite - I bought one of these last fall and really like it so far, its about half the weight of my regular long and half the size packed, less than a foot long when packed.
They are a bit pricey but worth every penny! - a great investment.