I have a dowco cover for whichever bike is not being actively ridden, and a cheeep cover for the one that's getting uncovered more regularly. The dowco breathes better and doesn't trap moisture. But it's also bulky and so doesn't ride well -- likes to stay home. The bulk helps keep it in place in the wind, and the beefy elastic around the edge means you probably don't need tie-downs. I've had my Dowco since about 2004 and aside from a little mildew stain on the inside lining and a couple of roach burns from parking too close to the campfire it's still in perfect order. My kid has had his Jackal under a dowco year-round in Anchorage. Last time I visited, it was also in very good condition.
The cheeep one (looks identical to the pics at Sierra) rolls up tiny and can be stuffed in a side bag (if you don't have anything better to put in your side bag on account of it takes the whole thing). It's water resistant, but can make it rain on the bike from condensing moisture. It doesn't stand up well to hot pipes, so unlike the dowco you need to wait for the bike to cool down before covering it. It also has no elastic to help hold it on the bike, and cheezy tie straps that rot off in a year. I'm into about year five on the cheeep one. My kid and I bought them in bulk when the mass of bikes exceeded their covered storage volume.
I threw the size large cheeep one on my trike the other day. It's roomy enough to get over the handlebar (no windscreen installed) and over the rear wheels. It should be plenty big enough for a 1400 in full touring gear.
Another thing that catches my eye on the Sierra website is the Chinese made (I think all there stuff is china) ATV luggage kit. The quality of the zippers is appalling, but some wax helps them last. The faux hippo hands are what caught my eye though. Even the cheapies like these are typically ~$30. For someone who needs casual luggage, this package might be a good deal.
