MLPPP isn't an old technology, it was the best way to get multiple links onto a single IP. Granted it works best when the characteristics and speed of the lines are very similar.

Do you actually need bonding, ie single application getting combined capacity on a single data stream, or will load balancing do it for you ? The latter can work on any two lines from any ISP without getting into the more costly and complex bonding solutions.

200 GB remains statistically a high use. It's a DVD a day and is deliverable with well below 1M running 24/7. Faster speeds give you quicker download times that will tend to increase the amount you download but not pro-rata.

In reply to a post by stonesy:

Is there any packages available to view on their website? I couldn't find any info on the bonded FTTC services.

http://www.aa.net.uk/broadband-extraline.html
http://www.aa.net.uk/kb-broadband-bonding.html

You can also try Sharedband. We have a good number of customers bonding VDSL. Visit our website at www.sharedband.com. If you click on the buy now tab, you can see the pricing for bonding two lines. You will need to purchase the power routers though, as you need the computing power at your end to process all the packets. If you need to discuss the solution with us, call on 01473287207 option 1 during business hours.

Richard

why do you want such high bandwidth?
xdsl is not a good solution if you have reliability concerns