My Can Am was a love hate relationship in the beginning. I had some issue with limp mode and fighting with Bert's service dept and Can Am to get things fixed. It was a spark plug issue. Other issues I had were my front diff spit some bolts out in November (I was around 4500 miles) and that was fixed under warranty. I had my power steering unit replaced under warranty as well. I am just under 5900 miles on my X3 currently.
BRPs tolerances are questionable and a gusset kit to keep the bolt holes from wallowing out is highly recommended. I have not had any frame issues. My friends had some some issues with cracks near the rear swaybar mounts and one ripped his front upper shock mounts out of the frame. The latter prompted me to get a shock tower brace.
Maintenance as far as oil changes is messy due to the drain plugs being near a cross member. If the skid plate was not riveted to the frame it would be less mess with the skid plate removed. Other than being a little messy it is not different than changing oil on a RZR. Changing the front diff fluid and Trans fluid is easy and mess free. Getting to the spark plugs does require removing the intercooler, but it really is not that big of deal. You don't have to touch the spark plugs anyway. Once you figure out how to get the front plastics off in one piece it is pretty simple. It is not the easiest SXS to work on and you do have to have some patience, but once you figure things out it is not that bad.
Currently there is no other SXS on the market I would own other than the X3. Despite some of the short comings it is the most fun to drive, handles everything very well and it hauls ass. The rotax motor has tons of power and they are super reliable. I had a XP1000 for 4 years before I jumped over to the X3.
The base model X3 is a good car and would be a blast in a 2 seater. The beauty of the base model is you can add an intercooler and tune and increase the hp significantly. The price is nice at $18,999 for the 2 seater. If you go the X3 route I would try to swing the 72" wide model. They have a 172hp RS model that has a MSRP of $22,499 or the have a DS (64") 172hp which as a MSRP of $20,999.
If you do end up with a X3 I would recommend you get the following:
Gusset kit for the front - you do not have to go nuts. I have been running a simple kit from HMF that was $129.00.
Shock Tower brace - I run a TMW brace, but there are others that will do the same job.
If you get a 72" wide model a gusset kit for the lower arm is advised. My friend welded mine on to the arms. The kit was $69.00 from Extreme Performance.
If you want a great break down of the various sport models Shock Therapy did an excellent job.