Yup went up to SRS last weekend, once again I'll commend their customer service and prices.
Had a play with the 50-500mm and decided I prefered the much cheaper 150-500mm, and at that price in pentax fit its quite a bargin. So far only done some test shots, seem to find OS-1 is best, with in body shake off, or in body shake on OS off... Hopefully the weekend after next I'll spend all sat playing with it
Also that pentax Q, with its 8.5mm lens at £349 + £50 cashback. Temptation! Sure the quality is crap, but its tiny...