If you're coming off of a Tommaso SLX you're probably an "enthusiast", esp if you were using toe clips and straps. Heck if you know what one is then that's enough. If that's the case then the Look Keo (Classics or whatever) are hard to beat. They are easy to clip in/out, the cleat is easy to check for wear, and they're readily available.

Although I haven't tried a Shimano (Look style) pedal they should be similar.

The double sided pedals are nice if you are walking around a bit, but if you're used to clips/straps, it's probably not necessary. If you want to go this route get a ubiquitous one like a Shimano SPD pedal. I wouldn't get the platform/spd one, I'd get the straight up spd one.