Hi Dru
I have the Xcalibur on loan for filming and am very happy with it. I would prefer the switch to be on the left but I've quite got used to it now. The build quality is fantastic, it's built like a tank. That's its strongest point really, it will last for ever, even if the design is fairly traditional. You can see me using it in my latest YouTube videos if you want.
The other saw in this price bracket you may wish to consider is the Jet. You can mount the switch anywhere you want. It's downsides, to my mind are that it is not built quite so well and it has a bigger footprint - it takes up a lot of space, especially with the sliding table. The other thing that put me off this was reading quite a few less-than-favourable reviews from people who had used it daily for a couple of years. Worn and seized bearings was a common complaint. Certainly if you look under the bonnet and compare the two they are poles apart. At this price point a saw should be capable of professional use.
I think Tony has the Ax and is very pleased with it, I think he has a review somewhere on here, IIRC.
I think you are complicating matters by suggesting a 5-600 budget but then dropping in the X! You can't really compare the two. People who have the SIP usually say that it is a lot of saw for the money. I've seen one at a show and I think they are probably right. That doesn't mean it is good in absolute terms though. I'm not trying to knock it, I've not used it, I don't know, I'm just pointing out that it is not the same, that's all.
The best thing you can do is to try a few out. Either track down local woodies with different machines or go to a sho. Harrogate is on right now, although I do appreciate it is not exactly local to you!
Best of luck with your search.
S