Garmin 310 or 910/920

My old garmin 305 is on the blink.
Does anybody use or recommend 310xt or are the newer 910 or 920 xt a better bet.
Looking for something I can use for all swim,biking and running.
Are they reliable in open water e.t.c
Any feedback appreciated.

Every Garmin I've had keeps adding distance even when I stop for tea and cakes. I've not used my 910 properly in the pool yet.

910 is great for all three disciplines and some good deals now the 920 is out. The distance recorded for open water is a bit iffy as mines looses GPS connection when underwater!

I have a Garmin 310XT. I bought it to train for the Outlaw last year, and have found it to be absolutely fine, although I only use it for the bike and the run. I know Mariska uses hers for open water. I use a Garmin swim in the pool, which has also been really good. That was recommended to me by a friend, who has done several Ironman events, but it doesn't work in Open Water (really helps for counting the laps in a long swim session though!).

Thanks All I already use a poolmate live for the pool so will decide which one suits my running and biking needs more.

I use my 910 for all three disciplines and it's great. Finds a signal far quicker than my 305 did. The ability to track open water is helpful, although the track it creates isn't perfect due to poor signal strength.

I keep my Ant+ permanently in the computer, so my 910 automatically downloads whenever it's a meter or so away.

Also the 910 has a 20 hour battery life as opposed to 10 hours for my old 310, although I don't know how long the newer 310s last for.