Hey all, longtime lurker first time poster! So I really want the new 2012 27" iMac and I'm trying to decide on what BTO options I get. Recently I tested out some 2011 iMacs, one with an SSD one with an HDD and was absolutely blown away by the speed of the SSD and how much of a difference it made to performance, and I don't intend to go back to HDD! Now my question is, obviously the SSD on the new iMac is eye wateringly expensive, but still worth it over an HDD. However reading the forums a lot of people have advised alternative lower cost solutions, such as sticking with a cheaper internal drive and going with an external SSD. My question is surely the thunderbolt connection will be a bit of a bottleneck in the external SSDs, to what extent will having it connected externally limit the blistering speed of SSD? Plus is it possible to install everything on an SSD and not even use the internal drive at all?