I have not seen the Cruise yet, but I HAVE seen the new Flash UL stuff sack/day pack, so I wanted to share some interesting news about it.
The folks in REI gear development have managed some sort of awesome voodoo magic with the new UL line, because the packs are going to be made out of the substantial tougher fabric like that of the new Flash UL. This stuff feels thicker and tougher than any of the UL packs I've tried, including Granite Gear, Gossamer Gear, the older REI UL packs. But somehow, the weight is the same. My older Flash weighs 9 1/2 ounces. The new ones weigh out at 9 1/4. I'm still trying to figure out how they managed it. It appears they removed one extra panel on the inside that was designed for the ten essentials, but otherwise it is the same. And still at the $25 price.
The Cruise is a tougher modification of the UL 60, and the new fabric will make this a MUCH tougher pack, so that a general backpacking audience can enjoy lighter weight without the normal delicacy associated with lightweight gear. The Cruise only lists at about 3 ounces heavier than the original UL 60.
I would wait until they hit REI shelves and try them instore before I ordered a nimbus. If the suspension is exactly the same as the UL 60, you'll find the nimbus somewhat more comfortable, but very possibly not $100 more comfortable. Just a thought.