I don't know what style of boat you are trying to fit but here's what I have to offer. I have had several of the blue ones that are sold at BassPro and they have served me well. I don't recall the model number. They are durable enough to withstand towing but I would have liked more anchor points. They only offered a motor "hood" or cover that was separate from the boat cover itself. That being said, they generally lasted 3 to 5 years before they would begin to fade and dry rot. My boat has to sit in the driveway under several hours of direct sunlight and this definitely expedited the breakdown of the material. My only tip is to make sure you have something under the cover in the low/slack areas to help the water run off and not pond anywhere on the cover. I have made my own but most companies offer support poles just for this purpose. Sorry to ramble but I did want to suggest a company I found online and ordered my latest cover from. They will ask your exact boat make, length, model, year, engine size, and whether or not it is an outboard. Their covers are made specially to fit your boat exactly and they compensate for things like walk thru windshields and pedestal seats, which mine has both. There is also extra room up front to allow for your trolling motor. I have a 17 1-2 ft ProCraft fish & ski (see avatar) with a 115 outboard and I am completely pleased with the fit and craftsmanship of the cover. It just feels like better quality than previous ones and they said it would last at least five years and more if I treat it every so often with water repellant (but that won't be necessary for a few years at least). Anyway the company site is
http://www.boatcoversdirect.com/ and the one I got was $385.00 total. I am completely satisfied with the quality. The motor hood is attached to the cover and I requested a few inches longer to compensate for boarding ladder and how far I wanted the cover to extend over the edges. I'd rather it be a little too big than too small. Tip: cut swimming pool noodles into pieces to cover any sharp edges to keep them from tearing the cover during wind storm or trailering. Here's a pic of my cover.