Indoor Bike Trainer, what should I get???

Rollers are a whole other animal...

Fluid trainers will give you more of a road feel. Previous generation fluid trainers had a bad reputation for leaking, which is not supposed to happen with today's trainers, but I will tell you that I had a string of bad luck with leaky CycleOps Fluid 2 trainers (which are highly regarded amongst BTers). I bought a new one last year, which leaked within a few days. I received a new replacement which also leaked within the next few weeks. I then bought a Kurt Kinetic Road Machine, which are the only fluid trainers with a completely sealed fluid chamber and it works great and price is comparable to CycleOps. I found ebay had the best pricing, as there are reputable sellers who will package a trainer, rubber mat, riser block and power meter for about the same retail price as just the trainer alone.

As for a dedicated tire, it is true that a trainer is harder on tires than road riding, so it is a good idea to save your good tires for the road. Saying that, it can be a bit of a pain to change the tire if you are putting the bike on/off the trainer frequently (not so much a problem in the winter in colder climates where you may keep the bike on the trainer for the season). If cost is not important, get a second, cheap rim with a tire mounted specifically to use on the trainer, then you just need to do a quick wheel swap instead of changing out the tire.

x3 on the CycleOps. i never found a better price ($235 delivered) than here:

http://www.ageebike.com

I own a Kurt Kinetic and have used the CycleOps trainer at local tri shop during winter indoor group rides. I like the tightening mechanism on the CycleOps better, it works kind of like the quick releases on your bike wheels vs the KK which you have a large knob to tighten.  But after that point, the rest is in favor of the Kurt Kinetic.  It is a bit heavier and has a more "solid" feeling to it and the parts feel like they are way better quality. The rollers have never had issues with leaking like the CycleOps have although many people who own the recent generation CycleOp trainers havent had this problem either.

You probably wont go wrong with either though because it appears that people who own each of these trainers have been happy with them.

As far as rollers go, I havent tried them, but you can see them in action if you go to youtube and do a search. Its fun to watch people use them, but I dont know what it is actually like.