I'm looking for 2 speakers and a sub with receiver that's going to give a bit more punch than my current system.
I'm not sure that more power than your current 1000w is the answer for "more punch". You already have lots of power. I suspect your answer is in the speakers and subwoofer. Conventional wisdom says buy the best you can afford.
The difficulty lies in identifying "the best". You can likely only hear a few samples in your local stores. One solution is to read reviews by trusted professionals who are unbiased. They use discrete measurements that can be compared between speakers, in addition to subjective opinion based on how the speakers actually sound to their ear.
This site, audioholics.com, offers a free 2014 Top Gear Guide. It has their top picks for the year in various price ranges. You can get it by signing up for their newsletter, (free), here:
Audioholics Newsletter Sign Up: Free 2014 Top Picks AV Gear Guide | Audioholics
For $299/pair, they recommend this speaker:
EMP Tek E41 Bookshelf Speaker
(The EMP site says it is now discontinued, but you may still find them on other sites.)
The Gear Guide has recommendations up to $2k/pair.
People on this site have speakers up to $20k/pair, and will be happy to give you their thoughts if you're in that range.
The Audioholics subwoofer pick for $499 is:
SVS PB-1000 - 300 Watt DSP Controlled, 10" Ported Subwoofer
They also have one for $1595, and people here have a lot of subs that go between $1500-2000, and some even higher.
For your 630sqft, I'm guessing your current AVR, these speakers for $900/pair:
http://www.definitivetech.com/products/studiomonitor-65 , and the $499 sub above, will give you all the quality and "punch" you could ask for.
