And.. you get what advantage from a package deal? Do you imagine they're going to blend together better or something just because they're sold together and are by the same company? A la carte is the way to go unless you want to sacrifice performance for..well.. uh.. brand name I guess.
Definitely get all five SPEAKERS from the same company and even speaker line (though IMO you can skimp on surrounds) but it does NOT need to be a so-called package deal.
The sub in particular from most speaker companies just don't match up to good internet direct subwoofer companies.
Three reasons
1) You get little deep bass in open rooms.
2) The larger the woofer, the less distortion is likely to be created as its excursion rises. I'm a proponent of 18" drivers - NOT only because they can get louder but because they are flat-out effortless at lower volumes, and can produce deeper bass too. The larger it is, the less work it needs to do to move air, and that's what bass is. Less work normally means means it sounds better.
3)Velodyne subs are overpriced.
If you like to overpay for undersized subs then be my guest.
Have you heard it? If you want to go with Klipsches then do what you like; i have nothing to gain from stopping you.
If what you need are reviews then here's some aperion reviews
http://www.audioholics.com/reviews/speakers/floorstanding/aperion-intimus-concert-533hd
http://www.audioholics.com/reviews/speakers/floorstanding/aperion-audio-intimus-6t-db-hybrid-xd
http://www.audioholics.com/reviews/speakers/floorstanding/verus-grand
It's not about loudness, again it's about instant/dynamics capability. The more capable the amp, the less chance of straining to drive your speakers. If HDMI in connectors are enough to sell you on the yamaha, then so be it assuming the cost is the same. Just don't pay more for a receiver with lesser amplifiers. The marantz I linked is dirt cheap and lets you focus your budget where it really matters.
that is not anyone here's goal when it comes to watts or driver surface area. Except maybe one fella....

1) A Package deal gets you.. what advantage? You can still get the five speakers from the same company, just subs and electronics elsewhere.
2) Opinions on Klipsch vary, but I will say that they are boom and tizz speakers that i wouldn't want in my home. There are some horn speakers I might want IE Gedlee, AudioKinesis, Pi, and JBL Pro, but not Klipsch, at least not the specific models you are looking at which are voiced to sell, not to live with.
They're not "well suited". Rock music is like any other acoustic music - it is best reproduced on speakers that won't significantly alter the frequency / sound power / time domain balance. When people say they're well suited they mean they're voiced to overemphasize "fun frequencies".
If Klipsch's entry level speakers are well suited to anything, it might be trance and autotuned pop music... not that those genres sound poor on any other speaker, and if someone prefers a different sound there's always graphic eqs for smiley face settings.
Get what you like, I guess. It just sounds to me like you could do a good bit better for yourself.