I'd start with only the camera body especially since you have two lenses you're happy with.
When you buy a lens that is being pushed with a camera body, you're usually given a "kit" lens. What that means is that the lens works ok but it's not necessarily the best of quality. You might be happy with it but then you might not be either. Personally, I've never liked the kit lenses that came with SLRs.
In terms of the range you have, for most things that sounds ideal. I'd opt for a really wide angle and also for a longer telephoto but which comes first depends on what you do. If you're after wildlife and stuff like that, a long telephoto is the answer and in this case you want one with a buit in image stabilizor so you don't have to constantly use a tripod.
If you're into landscapes, group shots, archetecture, stull like that, I'd go for a wider angle lens. In this case you also don't need an image stabilizor.
The other thought you might consider is a macro lens. If you like doing closeups, flowers, bugs, fungii ... there's nothing like a dedicated macro lens for that kind of photography.
Another tip, buying another lens later on usually costs you more. So if you do decide what you'd like as an ideal third lens, see it you can get a deal with the camera body and the lens at the same time. There's no rule that says you have to buy a lens that's being offered with the camera body. Often retailers will give you a break when you buy both together. Just don't fall for the kit lens that's being offered unless you're sure that it's a quality you want and need.
Finally, remember too that you don't have to buy a Canon lens. There are other lens designers like Tamron and Sigma who make incredibly fine lenses often at lower cost and/or with ranges that Canon don't carry. Personally I don't like these but many do. I spent thirty years shooting with a Canon professional SLR and all my lenses were Canon. I've also spent ten years now shooting with a Nikon digital SLR and all the lenses for that are Nikon. However I've known many people who have been very happy with the third party lenses and they've saved a lot of money in the process.
I hope this helps a little. Good Luck!