You don't mention
what lens or lenses you already have, which might have some bearing on how to proceed. It may be that you don't really need the lower end of the zooms you mentioned, in which case you might be happier with a fixed focal length lens like the 300mm F:4 IS L which is a very nice lens and gives you the reach for which you are looking. If you go back to the earlier post "Which Camera" and look at the photos I posted of my knucklehead in and over the water, those photos were all shot with a 300mm fixed focal length lens. A good lens really is an investment and will give you many years of service. In the telephoto range that you are talking about, there are Canon lenses priced all the way from about $2500.00 (almost certainly more than you want to spend(more than I want to spend)) down to a bit over $200.00 or so. When you buy a lens to a great extent you actually do get what you pay for. Often a good option is to look for previously owned equipment sold by a REPUTABLE dealer like
www.KEH.com. By buying used, you can frequently move up at least one step in quality. You have mentioned sort of the least expensive telephoto zooms. In that group, only the 55-250 is image stabilized, and it is, I believe the older IS system. With telelphoto lenses (and telephoto zooms), you really want image stabilization. I just posted a detailed explanation of IS in my last post at "Which Camera?"
So, here's what I would recommend without breaking the bank (depending on the bank size and how long you think you may use the lens).
I would probably skip the three lenses you mentioned and look for a used 70-300 F:4-5.6
IS USM (list price $649.00, or $364.00 in "like new" condition at KEH) on the low end or a 70-200 F:4 IS L series ($1065.00 in EX+ condition at KEH) sort of at the high end. I also found a 300mm F:4 in EX condition for about $750.00 (depending on what lens you already have this might be my first choice considering what you want to do). Hope this helps.