With winter coming, we're kicking around the idea of getting a trainer - and from the bit of research we've done so far, it looks like liquid trainers are better than wind or mag trainers. I'm contemplating getting one for my husband for Christmas - any tips or watch out fors? Any favorite brands? Our Trek store sells a Cyclops mode for about $400 - I'm hoping not to spend that much but I also want to get something decent that we can use for many years.