As the previous poster mentioned, too many speaker options to say XYZ is best, but here's an interesting thread that will help ensure that, whichever speakers you purchase, they will be well designed and sound very good:
Having said that, a few options that should fit well within your overall budget while providing the clean SPL you are looking for:
Revel F36 towers, C25 center
Focal Aria 926 towers..nice sale currently on accessories4less
KEF Q950 towers, Q650 center.
KEF R5, R7, R2C center(pricier but the R3 bookshelf posted *extremely* good measured performance, which is likely to transfer to the towers)
Tower speakers will give you multiple woofers and larger cabs for better capability and lower distortion above where you cross them to subs. Also, depending on taste, might look better and be sturdier than little bookshelves balanced precariously on little stands.
For some, narrowing the field down to a handful of well designed speakers(that you can determine based on the correct measurements) that meet your price and capability requirements, along with narrowing things down further based on aesthetics can often lead you to 1 or 2 solid choices.
I think the SVS subs you are considering are pretty good for their price...however there are a few other options that will give improved performance, specifically in the mid and upper bass:
-Hsu VTF-3 Mk5(VTF3.5 to make it a bit easier). Probably double the output up top of the SVS. Sounds like you will have high expectations for your subs so I wouldn't be too quick to give up headroom.
-Hsu VTF-15 Mk2...about the same as ^ above 30 Hz, but significant advantage below there.
-Rythmik FVX15 or FV15HP, although this may be pushing the budget at some point depending on speakers.