With the high-aspect ratio, non-overlapping jib on the 235 I think the spinnaker is a pretty vital bit of kit. Otherwise,as soon as you get deeper than a beam reach the jib starts to collapse.
The asymmetric is good fun and a pretty large sail so you can get some great downwind surfing if the seas are helpful. The further off-wind you go, the more you need to ease the fore-guy to allow the luff to get a good curve in it as you get onto a broad reach.
The snuffer system is, in my view, a bit of a mixed blessing - I kept getting the snuffer line caught round the spreaders and eventually bought a rail-bag that clips onto the guardrail.
We sold our 235 this summer and have moved into something very different - a long keel Vancover 34. I bought an asymmetric for it from Sobstad and it has an excellent furling system that might be worth considering. The luff has a dyneema line sewn into it so, that as long as the halyard is pulled tight, the furling drum at the bottom (which has a continuous line led back through a block kept under tension with a bungy)transmits enough twist up the luff to give you a good tight furl. So you hoist the sail as a furled thing then just pull the sheets and it's set. Much easier than the snuffer and it looks better without having the snuffer 'funnel' up at the top of the sail! Furling it is easy and you can leave it furled and ready on the bowsprit. It cost me about £1400 (but is more than twice the size of a 235 spinni at 75 sq. m)so it might be worth getting Sobstad to quote you.
Graham Keating