For me I think the IXL is a better sub and worth the money over the SI and Dayton (all based on thread lurking is all), but I'm like jbrown says, I look at the UXl and think, well I would save up for that. I'm not looking to buy right now anyways, but if I was I'd go for the UXL even if I had to wait/save. It has more xmax, more power handling, fits in a smaller box, etc. Its a real sub. Not some amateur boom maker. Everything about says "give me your best".
I just need some amp power before I can consider it
Since this thread sort of went on a tangent from the UXL-18 to the IXL-18 and there are mini discussions on the IXL-18 ongoing elsewhere, I just started an IXL-18 thread so that hopefully we can get a nice discussion going all in one place that can be later referenced for all IXL-18 related stuff.