I have been reading this forum for a few months & I feel I have gained a lot of knowledge about hot tubs. I look forward to reading the post's every day . So first I would like to thank all the regular contributers since this is the first site I feel is truly genuine to the cause.I get a laugh out of some of the reply's & I can see some of you are really biting your tonges as you really want to push your own product but you refrain (very professional). I feel I know all of you (thanks). Okay so here is the question. I have narrowed down the search between the 05' sundance optima or the 05' caldera utopia niagra (which I never heard of before this site) I got a price of $8,800 for the utopia which includes ozone,steps, cover lifter,delivery, and a price of $8,745 for the optima w/ the same extras. From what I read in this forum I just assumed that the caldera was a step below the sundance so was surprised at the similar costs. Is the sundance a better deal? also I have another question my son has asthma and was told that ozone was bad for him is that true & if so then baquaspa & no ozone would be a better alternative?