Oh Definitely new vs old, the 5800 RD is also the one I've fallen on a couple of times!
Once I considered how rough my 105 one was looking (and the tension pulley looking quite worn) it was an easy choice to buy the Ultegra RD for £42. Prices have gone up since due to EURO exchange, even with new Ultegra out.
Cassette was probably the main cause of my noisy drivechain, I have a feeling it's the original from my Giant so had done 8000+ miles (& probably seen 4 chains).
Ha, the screws on my decking although only ~12 months old where cheap wooden ones and obviously not galvanised as they'd rusted loads!
I'm back to looking at wheelsets, handily Wiggle have the
Zipp Course 30 wheelset at 18% off so down to £650. Previously to get it anywhere below 700 I had to buy the front and rear from different places! One of the guys previously at my LBS had said that their deal with Zipp meant they could match any online prices as Zipp would still honour their margin on them. Gonna email them while they're in stock and cross my fingers!
Had an agreement with her indoors to wait until mini^me was here... Really do need to also flog lots of old/big clothing over the next few weeks to keep her on side...