PB1000s are a good choice for HT, but the SVS Ultras would be totally wasted with them already doing the low end and you doing 100% HT i.e. no music.
I'd get the Chanes from your list, by a country mile...best bang for the buck, at least before Canadian taxes/customs kick in.
However, the best deal all around in Canada would be the NHT SuperOnes from Amazon.ca, they are somehow 50% off US retail prices...at such low prices you can get them all around for an identical soundstage, and you can even use their smaller brother the SuperZeros as Atmos speakers on-ceiling if desired.