As Nicholas says, if you are in the UK it really is just RH Designs (though if Hobson had been stuck with this choice, he would have been ecstatically happy!). I bought the RH Designs Stopclock Pro (I knew I didn't need any of that enlarger meter stuff!), and not wanting to be melodramatic about it, it has revolutionised my printing. After an hour or so actually acquainting myself with the controls, I found the timer fits in with what I want to do when printing, rather than me making compromises to fit in with the way the timer works.
I am glad I went with the separate timer rather than the Analyser Pro combined enlarger meter and timer, as the Stopclock has the two channels, and more memories making it more flexible than the combined unit. So. When I bought the Zonemaster II recently (yeah, I know, no truck with that enlarger meter schtick, ect!!), I found myself in the wonderful position of having the best of both worlds! I can use the meter linked up to the timer, which is great for proofing a lot of negatives in a session (not just proofs, but good working prints), and for the more creative work, use the timer alone, or with the meter seperately.
What I am really saying is, buy the StopClock. It is a timer that works with you. You may never need an enlarging exposure meter, but if you ever do, you can add the ZoneMaster, and not notice the difference in your working methods (apart from the fact that it is so much smoother)!