The 245 you mentioned in your OP has paddling metrics, but the 45 doesn't, unfortunately:The forerunner 45 is on sale for <$200 right now. That's what Ariel wanted first, so....I'll take a look at everything tonight. Smaller would be better, but. Thanks for the help.
Also, you might ask your coach if accurate heart rate is important. You'll want a chest strap if so, as the wrist-based HR won't be much good paddling.