I decided to buy my own modem so I could stop paying Comcast $10.00 per month to rent theirs. I went with the Motorola ARRIS SB6141. It has a lot of good reviews and was also recommended by the guy at Best Buy. I have this connected to my Airport Extreme and then to my Mac Mini. Speed are pretty much the same. 120-125 Mbps on the Mac Mini. WiFi speed vary. Sometimes they are in the 110-120 Mbps range and other times a little slower. Something that I've been noticing, and it seems to be happening after the modem swap, is sites don't pull up as fast as they used to. I would click on a site before and it would come right up. Now it seems like there is more of a delay. I've even seen a message come up on my phone and iPad that said something like "slow connection". I just did a speed test on my iPhone and iPad as I'm typing this. Speeds are all over the place. Three tests with the phone ranged from 20-25 Mbps. I did a few more tests with the iPad. Three were only 1-2 Mbps. I restarted it then did it again. That produced one 57, one 96 and one 107 Mbps. Ping Nothing else is on WiFi as I'm doing this. Actually, I just did two more with the phone before I posted this. Both started off slow. I thought they would give me results in the 25-30 range. Then they spiked up to 103-105. Any ideas? Thanks!