meters? convert to dollars? so I take it you are obviously not in the US...
I prefer the marantz psb because I have heard them towers and I have heard the bw's and I prefer the PSBs, also I prefer the marantz to the Onkyo... Really the system looks fine, except you can do much better on the sub side, to me HSU has the best value, but HSU, SVS, Rythmic, and the other ID companies are going to give you a much better subwoofer... I use HSU vtf2's {I prefer it to the vtf 3 and the 15 for some reason, its fast-ish, really deep and super clean} and I only paid $600 shipped each {I have two but only turn one on 99% of the time), and the sub you picked for almost twice the cost, can't come close to it, IMO.. I have heard the sub300 and granted it wasn't in my room and was in a large store, but it didn't do anything for me, seemed like it was trying to hard...
PSB makes really nice speakers, marantz makes really nice AVRs, so you are in good shape there, but the sub is going to be the weak link...
PS I almost bought a set of them T5 towers on demo closeout for $329 each, but had no where to put them, I belive they are pretty widely available for under $500 each...
As for your budget...
I know internet sales are a pain, BUT...
you can get ----ascend Sierra towers, with a Horizon center, and 200se surrounds, denon 3313 AVR, and a VTF3 all for under $4600 {most likely shipped depending where its going}... And that system would be EPIC...
Did you look into Wharfedale speakers, the diamond 10s sound amazing for short money...
Sorry to give so many options, the psb marantz system looks good, but I am always in the best bang for your buck mode...