This weekend I modded my WNR3500Lv2, and added external antennas. The antennas I am currently using are only 3dBi. I wanted to see if they would give me the performance I needed. I figured that since they where external instead of the internal I would see a big improvement. I did see some improvement. However, the improvement I saw was mainly on the laptop that is positioned the furthest away. There isn't much of a difference in signal to the other devices. I am looking to improve the signal even more by adding bigger antennas. I'm wondering if I should go with a 7dBi, or would a 9bBi be over kill for in the house? The laptop is about 30 ft away from the router. However, it has three walls to travel through. Due to the walls I am leaning towards the 9dBi because I want to make sure I have enough power. However, I really don't like the idea of having antennas sticking out of the top of router a foot and a half lol. What I'm worried about with 7bBi's the signal width is 30%, and with 9dBi's it drops to 25%. I have attached a picture of the way my wirless network is setup. I'm worried that the beam will not be wide enough to hit the laptop infront of the router, and my Dish Network receiver that is positions diagnally to the front left. To give you an idea of distances. Laptop 1 is positioned directly to the front of the router, and it is no more than 10ft away. The Dish Network is diagnal from the router to the front left, and it is approxemently 25ft from the router with one wall. The distance between laptop 1 and the Dish network reciever is approxmently 15ft if that. Also, here are the antennas I'm looking to buy. It is the same guy I purchased the wifi pigtails from. 9dBi's http://www.ebay.com/itm/New-Dual-Ba...936?pt=LH_DefaultDomain_0&hash=item20c4a30ac8 7dBi's http://www.ebay.com/itm/140727221513?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649/ 6dBi's http://www.ebay.com/itm/New-Dual-Ba...564?pt=LH_DefaultDomain_0&hash=item20babb971c He doesn't sell 5dBi's.