Wireless home networking

I just moved out my apartment into a new house and I'm finally using my router's wireless ability. Unfortunately I just realized my router sucks. I think it may have some damage. Whenever two devices are simultaneously using the wireless, it only responds to one at a time. You might try to go to a website, but it won't load until 2 minutes later if another device is using the router.

I am thinking of replacing my router, but I don't know which one I should buy. I don't know if I should buy a wireless-G or wireless-N router. I barely know anything about wireless N except that its faster and has longer range. But would it have a significant effect? Currently when I use my wireless g router, I can get about 6 mbps using ethernet, and 4 mbps using wifi. Besides internet, I am also planning to stream videos through the wireless network.

So what kind of router should I buy? Also I noticed there are big price differences. What makes some better than others? What to look for one buying one? Thanks.

Wireless N is much better for streaming no doubt. From my 30Mbps cable connection I get 15Mbps out in my garage through two walls and accross my yard. Streaming HD movies out there works perfectly. I use the D-link DIR-655 but there are other decent brands to choose from.

The 2.4-5GHz dual band routers are ok but do cost more and are only required if there are many other 2.4 band networks in your area.

Thanks for the info. But how do I know which wireless N router to buy? On newegg there are some as low as $30 and some over $100. If I buy a cheap one like this, Newegg.com - ENCORE ENHWI-2AN3 802.11b/g/n Wireless Router With Repeater up to 300Mbps/ 10/100 Mbps Ethernet Port x4 are there any key features missing? What makes some cheap and some expensive? (sorry for my noobness, but I don't know much about routers lol)