Petri

Hello.

I know that basis of my question might have been asked and answered countless of times, but...

I have started looking in to getting a surround sound system for my living room, and Wii U being the main attraction of that setup.

I already know, that I need an AV-amplifier/receiver that supports LPCM.

Been looking at amplifiers, and my retailer only has 3 amplifiers, all from Sony, that I think might fit the setup.

STR-DH540 (5.2), STR-DH730 (7.1) or STR-DH740 (7.2)

Here are the questions, I slept through the AV classes, so I'm kind of outside with audio stuff.

1. Is there any problem using 7.1 amplifier with devices, that only support 5.1 (Wii U)?

2. Is there noticeable difference between 5.1 and 7.1?

3. X.2 refers system having two subwoofers? Can I leave another one out on those X.2 amplifiers?

4. Is there any sense or noticeable difference in having two subwoofers (X.2)?

As these systems can get expensive, especially since my wife is pretty picky about the speakers shes willing to let in our living room,

I've been thinking of building my surround system by working my way from ground up from 2.0 to 5.1 to finally 7.1 for devices that support it.

5. Would that be possible?

6. After 2.0, if I go for it, would I gain anything by going with 3.0 and then 4.0 surround system on Wii U or with any device?

7. I have been thinking of getting that STR-DH730, should it work with Wii U?

8. Any other suitable amplifiers on the market I should look in to?

And last, since I have no idea what I'm doing here.

9. Any tips what I should try to invest in, and what I should avoid?

I'm sure I had a lot of other questions as well, but they kind of got lost while typing this.

Not looking for perfection here, but any tips from anyone with some experience with surround sound systems would be welcome.