My 2 cents and to echo many of the comments.
Don't go out and buy everything at once. Get your body and primary lens and spend enought time so you will know what else it is you need.
Lens - get the best you can afford. For gen purpose, choose between the 17-55 and 15-85. Expect excessive distortion on the 15-85 at 15mm. If wide angle is important you might consider the 10-22 plus the 24-105. Hold off on tel zooms for now. Don't be surprised if you discover the 55-250 is not what you really want. I would save up for one of the 70-200s.
Filters - I highly recommend filters for lens protection. All my lens have B&W UV filters. Don't skimp on filters.
Flash cards - I have high end Sandisk.
Bags - buy a bag specific for your setup which means you will have more than 1 bag. If you are at a walk around event, maybe a top loader, when hiking a back pack. Don't try and get a single bag that covers everything, it won't be streamlined and efficient, furthermore it won't get used.
Flash units - I wouldn't recommend anything less than a 430EXII. Hold off until you figure out what you are going to shoot and need. You might discover (like I did) you really want to get into flash photog.
Tripods - I recommend going back to that shop and putting your hands on tripods. Get a tripod and head that can support the weight of your gear plus at least 50% more. My main tripod has a ball head, my smaller back packing unit has a pan head.
Misc - check out the Canon RC-6 remote, my most used accessory.
Good luck, let us know what you go with.
Edit: After reading your post again, I get the impression that telephoto is not very important to you where wide angle is very. I would seriously consider the 10-22 plus 24-105 option. 105 on a crop will give you decent telephoto anyway (168mm FF). Probably get the 24-105 first and save up for the 10-22. Personally I would hold off on everything else until you get your essential lens.