lots of probs w/ cyclops
I had heard bad things about cyclops, but found a fluid model on clearance for $100 so I gave it a try. After about 9 months I began to leak, and soon after, there was no resistance at all. Luckily, performance took it back. I've got the performance fluid, and honestly can't tell the difference from when the cyclops was new. Its a ton cheaper too, with plenty of resistance, smooth feel, and its pretty quiet.
Read the reviews here and on mtbr before you buy.