Upgrading router range.

[#1]

I currently use my internet on the second floor with several brick and plaster walls as obstacles and possible microwave interference. I have looked and there is no way to get the router closer to my computer, so I am looking at other solutions.
Is there a router with a better range and which will work without problems with XP, Mac, XBOX 360, and the PSP?
I ask this because I am having problems with streaming and connection drops. I currently use a 16 month old Netgear DG834G v4. I have looked at MIMO and RANGEMAX, but not sure whether these will work. Should N be enough? And what would you suggest. I wont be paying no more than £100.

[#2]

Is there way you could run a single ethernet cable from the router to the second floor? If you could do that (and you want to use wireless upstairs) you could get a Wireless Access point: http://www.ebuyer.com/product/46057

[#3]

Hi.
Homeplug setup would be the best way to go. One standard unit plugged in near your router and a unit with combined access point anywhere you want the internet.
http://www.solwise.co.uk/net-powerline.htm
Cheers
Jon

[#4]

Thanks Guys,
I have ordered a wireless homeplug and a standard one. Expensive but probably worth it if it works.

[#5]

Thanks for the recommendation on the homeplug. it's working wonders! From a 30kb/s to 120kb/s, I am now getting 260kb/s to 280kb/s on wireless. And it seems consistent right now. My mac connects to the line really quickly now, before it would take a few minutes to find it.
Thanks
Andrew

[#6]

Great they're working well,
Cheers
Jon

[#7]

Hi Jon,
I do have one issue with this setup. The utility disc which is used to detect and setup the wireless security measures is not working properly. I cannot access the solwise forum so i wll ask here. Is there any way to make a WEP without this software? Will the netgear WEP be sufficient?
Thanks,