Well sure - as I've said, I'm torn. But I just wonder if it's a cop out.
I mean, you're a football junkie, so why not address one of the original questions: is there an unavoidable trade-off between selling Agger and getting long-term value and upsetting the defence in the short term? £20m looks a brilliant deal for him, but it'd effectively mean having a new defence: would that have a major impact on our chances of getting 4th regardless of getting in a quality replacement and if so is it actually cost-effective?
I think the answer to those questions is always the same - depends who you end up buying.
In terms of timing, I actually think now is the perfect time to sell Agger if we are planning on doing so at some point. We've got a new goalkeeper and a new CB. We are not going to have the benefit of a settled defence or players that are used to playing with Agger anyways, so we may as well take the hit now and get it done providing the opportunity is there, i.e. Barca make us a great offer.
There is no point trying to establish a partnership between Agger and whoever this season and then selling him a year later and having to go through that process again.