Overall, I would go with the SVS, but you should listen to the Klipsch.
Klipsch tend to make a statement.
Most people have strong opinions on them. Some like them and some hate them.
I have Klipsch RF-82ii's and an RC-52ii across the front for my HT. I paid a total of just under $1100 for them and feel very good about them for HT. They are "exciting" speakers giving a great immediacy to audio events (especially in an action movie). Accordingly, they are also very nice for high energy rock 'n roll (which fits well with their "pissing off the neighbors for XX years" marketing scheme)!
They actually make for pretty good overall music speakers, but you have to be meticulous about placement/toe-in.
The directivity of their wave guide is beneficial in my room because they reduce the interaction and my LR is decidedly an acoustically poor room.
However, I think you are making a mistake to be looking at 5 speakers that are all the same. I think you should dedicate more of your budget to the front two (if you listen mostly to music) or the front three (if you are an HT guy). Your current speakers will be fine for surrounds. Do a test by playing a movie you know well with the front three speakers disconnected. I think you will agree that the surrounds do not need to be on par with the fronts in order for you to have a great HT system!
If it was me, I would get 3 great speakers across the front and spend the money you save on not buying new surrounds on getting 2 better subs than the PB1000.
What ratio of music to HT do you listen to? For example, I am 95% music and 5% HT (I am not including basic TV as HT because sound is mostly immaterial for talking heads of news, etc.).
