OK some progress....
Done a deal on another pair of Obelisks, which I'm going to split with a friend (who after hearing my system has just gone out and bought a 568.2MM), so we can effectively each gain a centre speaker, amazingly the pair I've just done the deal on is within 30 serial numbers (and the same finish!) of my existing pair so it should be a really good match.
Also done a dela with a fellow hiker for a G68XXV, I thought long and hard about an 861v4 v G68, but in the end plumped for the G68 as it offers a lot more input flexibility without going to any additional expense. Also it also leaves a space in the budget for an HD621.
I've just taken the Touch out of it's box, but I'm now wondering about the Transporter offer that Logitech are offering, best get the Touch up and running first.
I'll keep you posted on how it all develops
Mr Perceptive