hi vishwamv
i have dealt with finspreads and would recommend them. I have found them to be all round open honest and friendly to deal with. They have a fair range of instruments to deal with, indices ,currencies ,commodities, interest rates and shares uk, european and us.they hold many open days to welcome new clients and demonstrate their system,also some free training for novices like myself. the charting system on their site is pretty poor.I have not had price slippage problems with them but i try not to trade in the middle of breaking news.I do know people who have had problems with other companies, and refco has been mentioned.
Capital spreads seems an ok company to me,i have a free demo account with them, the range of product seems smaller to me, but i suppose it depends on what you trade, anyway they have their own thread on this site so i,m sure thats worth a look.Oh and i like their charts.
I also have a demo with oanda i find them very good, brilliant charting package, tightest spreads, lots of further research, like currency correlation and open and short ratio.I will go live with them soon, but they are only currencies .
Rod