If you have a triple, I'll join in the chorus of those saying stick with it. If you need lower gear(s), either get a wider range cassette (if your bike can handle it) or get a smaller chainring.

The reason triples have pretty much disappeared is because with 10 and 11 speed 12-32 and maybe even 12-36 cassettes a compact double crankset gives pretty much the same high- and low-end gearing as triples. And with all those cogs spread over 2 instead of 3 chainrings, there's actually just as many useful gear combinations, maybe even more if you're comparing a new 11-speed compact with an older 7- or 8-speed triple.