Linksys' quality has gone down the drain since Cisco bought Linksys, therefore the TC is a far superior router to your current setup (as the TC is the same as the AirPort Extreme apart from without the HDD). You could also use Powerline adapters and an AirPort Express, or wirelessly extending using an AirPort Express, to extend the WiFi network if you are having problems with just the TC.
The reliability of the Apple Extreme is very good.. TC much less good. 3years is often a failure point for stuff that runs too hot. Like your WRT600N and the TC with its Green Drive and internal power supply.
On wireless range though I would say pretty ordinary. I have tested all the generations of the TC and most of the Extreme.. including Gen5. In my double storey house with an old G wireless modem router (downstairs extreme end).. right near the TC/AE whichever I am running.. from the other end of the house (upstairs) the old G wireless gives more than adequate signal to get full speed internet.. the TC does not.. And 5ghz goes pretty much to the next room and then disappears but that is as expected.
Use the tests here to find what give good range.
http://www.smallnetbuilder.com/lanwan/router-charts/bar/58-2_4-ghz-dn (you can change the chart to give speed in the worst location ie F http://www.smallnetbuilder.com/lanwan/router-charts/bar/58-2_4-ghz-dn?see=P_F
Airport extreme is there. Well down but there.
Wow, that is a lot of information. Unfortunately, I am not that tech savvy to read it (let alone understand it). Can you provide any direction on making a router selection that will provide a wireless network which is reliable, easy to use/setup, has security and has good to excellent range. I don't upload much information, I don't play video games ..... I check my email, I surf the web somewhat on the wireless network, and I would like to start streaming movies through Apple TV in the living room as well as the bedroom.
As to backing up my computer, I am not totally sold on doing that with time capsule ..... I am probably more inclined to pay for carbonite and maybe use a wired external drive to backup my operating system from time to time.
Any help you could give on the wireless network would be appreciated.
Well, I took a second look and I am now actually reading the training information so as I can make somewhat sense of the data. It may be a few days before I can get up to speed. However, if you have some input based on what I have told you (oh yes, chances are my home network will most likely only have one person accessing it at a time) ..... don't hesitate to provide it.
Airport Extreme is a good option if you have ATV connected and airplay stuff running.. well worth sticking with apple to do that. It isn't the cheapest.. and not the best wireless but probably ok.
Don't buy a TC if you don't need TM.. it is a waste of money.
The Netgear WNDR3800 is cheap and good alternative.
Not the best wireless though.
Asus RT-N66U excellent wireless.. one of the best around.. not as good firmware.
That gives you one of three.. so much reduced..eeni meeni mainie moh
Thanks again for your help. It took awhile for me to understand and then ultimately narrow down the choice of router. But with all of that information available through the tests performed, I felt very good about my choice prior to actually buying it. Upon receipt of the router and installation, I feel even feel better. It works great and it appears with the improved performance I will not have to relocate the actual router. The choice I made was the ASUS RT-66U. Again, many thanks for your adice and time working with this newbie.