thinking of opening a spread betting account but can't decide which one to go with, any advise is more than welcome!

I have found IGindex.co.uk pretty good. Good interface, spreads, stop loss triggers etc. charting tools are very useful too. It may depend on what you wish to trade. Obviously the bigger/more popular markets have the best dealing spreads/costs. The only thing I don't like so much is their news service, which despite being a reuters feed is not presented in a very helpful format so I use bloomberg and others for news.

Obviously do your own research and good luck.