Quality lenses, these days don't come cheap, so have you considered using your current lens, since it seems to be generally satisfactory, but instead, stabilising those shots which call for it, 'in-post'. I have been using 'Mercalli-4' (Pro-DAD – Germany) for some time now and after a few basic skills have been mastered, I have found it to be almost indispensible. Although I shoot from a tripod with a fluid head, most of my shots, being of wildlife, must be taken at or near the extreme telephoto end of my shooting capacity, which means a great many unsteady shots. It may be 'thinking outside the square' somewhat, to use this approach, but 'Mercalli 4' has an arsenal of different settings to deal with all sorts of stabilisation issues, is able to put out high quality footage, and as a bonus, minimises the effects of that perennial curse, the roller shutter 'wobble' prevelant in so many consumer-level camcorders, if that is required. Try it, you may be pleasantly surprised.