Whats available to you locally? $6,000 will limit your selections and it may come down to how aggressive your dealers are with pricing. In no particular order, I would look for the following: Hot Spring Hot Spot's, Caldera Vacanza, Bullfrog X-Series, Marquis Celebrity, Jacuzzi j200, Sundance 680, D1 At Home, and Artesian South Seas.
Those are all entry level collections from brands regarded as premium and well respected. You should also research your dealers. They are your support and point of contact and a quality dealer is worth their weight in gold.
Your likely going to get lighting no matter what you look at, same with waterfalls. Skip the stereo. Full foam insulation will be the most energy efficient and will greatly reduce the likelihood of leaks because it supports the plumbing.
