A mate of mine had Speedplays on his bike when he went to get a fit from a well-regarded industry professional (this is second-hand information so I'll refrain from giving the name here in case I am mis-quoting something).
He was questioned on his choice of pedal and was told that the Speedplays' float and high level of adjustability are problems for amateur riders. Basically pro riders are experienced enough to already have a good pedalling motion and know when the pedal setup is off, but most amateurs are given too much freedom with Speedplays to develop bad pedalling habits and ride with a bad setup.
In short he was told to go get a different set of pedals (in his case he got Ultegras) before he was fitted!
I'm fairly comfortable with the 5* float on the Keos,from what I can gather I could lock the Speedplays in at the same amount of float. The double sided entry really appeals to me more than any of the other "benefits". I have to admit that I may end up sticking with the devil I know and buy new shoes and Looks giving me a spare pair for a rainy day. :)
Pat - I reckon Shimano Ultegra 6700 pedals will set your new bike off nicely as you will have complete Ultegra set up
I was informed by ???? of ???? that did my bike fit that the speedplays would be the pedal that he would recommend, reason, since my feet point outwards i hit the crank with my ankle, and i cant go any further with current setup (spd). Was told that the shaft on the speedplays come in different lengths and this would be of benefit. I do like the idea of the double sided entry since I have that with the spd's. Still i'm not sure if i will go down that track, I'd like to try before i buy.
The alternative is spacers like these.
Decided to stick with Keos, that way I'll have two pairs of compatible shoes/cleats available for rainy days etc.