From your answers (requiring load balancing of four lines at a single property in Basingstoke) I assume you're either looking for redundancy or want high speed and are in an area of Basingstoke not covered by FTTC.
You mentioned you wanted a very high FUP (>100GB) or "proper" unlimited, so I assume you're going to be using a lot of data.
To be honest; £25 a month including line rental (typically £10 a month if you're with one of the four or five providers who offer discounted advance rental) isn't an awful lot for a high FUP product.
As you've already commissioned BE and Tesco to install a line each, you're pretty much stuck with them for a while on those two lines (although you may
have made the right choice with BE).
Unfortunately it seems neither BE nor Tesco offer advance line rental discounts, so you're into;
£27/month for the cheapest BE unlimited + landline package (£17 for up to 10Mbps broadband, plus £10 line rental). This is the "BE value + landline" package.
If you wanted faster than 10Mbps (assuming your line will support it - unlikely at greater than 2km direct distance) it'll cost an extra £5 a month.
£20/month (well; £20.25) for Tesco's cheapest "unlimited" broadband + landline package, although at £6.50 a month it remains to be seen just how "unlimited" this will be (FUP, or "FUL" in Tesco-speak, seems to be 100GB) and they do admit to throttling of p2p, bit-torrent and "other file sharing".
I can see why you've chosen these two for starters, as they both fit into your 100GB FUP (which I assume is per connection) and £25 a month spec.
For the other two you may want to look at: -
Sky LLU, which is just shy of £25/month (for their cheapest "unlimited" broadband and line rental deal), even if you're going to take SkyTV (if you went for SkyTV, they give a £2.50/ month discount - hardly seems worth it just to get a bit of discount on your broadband).
Apparently Sky will do discounted advance line rental but it's not available over the web - you have to call them. This MSE
Talk-Talk (no, really!!). I say this as you'll then have three independent unbundled connections (for now - as BE/O2 seem to be looking to offload their UK land-line & broadband businesses, and God only knows who'll wind up buying or inheriting them) and one BT Wholesale connection (I believe Tesco still use BTW products, but I'm sure someone will correct me if I'm wrong), so you'll have maximum redundancy!
All in all, I think you could get your four lines for a combined total of less than £100/month, by taking cheap or advance line rental where available.
Or you could just wait for your local cab to be enabled for FTTC and use just one of your existing (or the above) ADSL connections as a backup.
That way the FTTC will most likely give you a higher speed than the combined four ADSL products and you'll still have the redundancy.
Hope this helps.
vDSL2 FTTC Infinity with BT
DL Sync 80Mbps
UL Sync 20Mbps
Edited by adebov (Sun 13-Jan-13 20:45:14)