TC will work with old AEX's??? Any input greatly appreciated!

Question

Hi everyone,
I originally posted this up in April, but got no responses. If someone knows the answer to this question I'd be grateful as my decision to purchase a TC is dependent on it!
Glossary:
TC - Time Capsule
AEX - Airport Express
My current set-up:
Billion ADSL2+ modem & 11g wireless router (I got this from my ISP, and will be keeping it because I use its voIP capabilities)
2 x 11g AirPort Expresses which I join onto the current 11g network - I only use these for the AirTunes feature
2 MacBook Pro's
1 MacMini
Scenario:
I figure when I get a 1TB TC I'll plug it into the router & use it to set up a new 11n wireless network. _**Will I still be able to use my old 11g AEX's to join onto the new 11n network so I can continue to use AirTunes? Or will I have to replace all my old 11g AEX's with the new model that support 11n?**_
On top of the additional expenses of having to buy new 11n AEX's, it'll be a pity of have to throw out relatively new and perfectly working 11g AEX's
Before we get even that far, I wonder if anyone has experience with using TC with a Billion modem/router? (I will turn the Wifi function on the Billion off of course). I have come across a couple of discussion threads where people described difficulty getting the TC to work with some routers.
Any input would be greatly appreciated!
Thanks in advance,
Leo

Answer 1

Hey, thanks for the help!
Does 'running in bridged mode' = 'dual-band network'?
I had no idea you could set up a dual-band network, which could potentially work well for me because I've also got a Mac Mini on my present network, which does not support the 11n system and is not known to be upgradeable to it (as yet).
So just to clarify, if I had this dual-band set-up, my 2 MacBook Pros & to-be-acquired Time Capsule could work off the 11n network, and my 11g AEX's & Mac Mini could work off the 11g network (from my original router)?
And I would actually be setting up 2 network names (1 x 5G & 1 x 2.4G) for the 1 same network?
How different would the network speed be if I set the TC up as '11n 5G only,' compared with '11n, b/g-supported?' I'd only be using Time Machine on my MacBook Pro (my work computer), so I'd like its network to be as fast as possible.
And one last question, would the Mac Mini have any problems accessing and writing data onto the TC, since it'll have to access TC through a bridged 11g network? (As opposed directly accessing the TC 11n network).
Thanks again!
As I had originally posted this question on the TC forum also, I will also thank the other helpful person with this thread.