wireless G and N routers together?

I currently have a wireless G router and everything is good. I just bought a new laptop and it has wireless N. I would like to use this so I'm looking at getting a new router and using it just for an access point for the time being.

I want to keep using the current setup and add the N router just for my laptop. Will I run into issues trying to use both wireless signals together?

I know the G router uses 2.4 and some of the N router also use 2.4. Is that going to cause a problem? Do I need to buy a dual band N router and just use the 5 ghz signal or will using 2.4 on both G and N be okay as long as they are different channels?

I want to make sure that the N doesn't have to throttle down because the G items I have are also using the wireless.

I want to make sure I can get the 250 to 300 Mbps speeds that the router should get for N.

I know a dual band router can't keep the G and N separate but the single band ones are cheaper.

I hope I'm explaining myself so it makes some sense.

And I don't want to put a ton of money into an N setup until the specification is finalized. So I'm hoping to get a cheaper N router than runs 2.4 and use it with my current G that's running 2.4. Will it work and not cause interference?

I'm looking to buy this buffalo router http://www.newegg.com/Product/Product.aspx?Item=N82E16833162026. It appears to only have 2.4ghz for the wireless N.

Here's what I want to avoid: http://www.smallnetbuilder.com/content/view/30224/100/

 

Theres going to be interference if both are going to be using the same frequency. Just wait for an expert to reply.

 

I figured that might be the case so I haven't purchased anything yet. If anyone could suggest a really good router that has 5ghz band for N, and doesn't break the bank, I will hopefully be in business.

I've been looking but the good dual bands are all really expensive and I haven't seen any that are just 5ghz.

 

I would just look for a good dual band one. Like the Linksys WRT400N Simultaneous Dual-Band Wireless-N Router.