It all depends on how much you can afford and as I'm doing my PPL now I'd rather spend the money on flying than a flash watch.
A 100 quid Seiko stopwatch thingy with an analogue dial has been good for me so far.
I'll be Indonesia soon so I could pick up an Omega for about 10 quid!
I find that an anologue dial is useful because it vaguely resembles a compass rose...