I've had the corded and cordless Bosch, and found them both to be good. The blue vibrates less, and feels a little more solid. the downside is that it is cordless, and the batteries run out frequently - to keep up, you'd need 4 batteries fully charged. However, there are few times when I need it for more than 3 or 4 cuts in one go, so it does keep up with this intermittent use.
When it finally dies, I'll be buying a Fein corded tool to replace it. A lot more expensive at ÂŁ200, but it has quality all over it. they also do a cordless now, but I dont want to be limited by batteries again.
Alan.