Hey Redlinesrule, maybe you could detail your $2500 budget to all who have responded. For example, is the $2500 the amount you can spend on the sled, or is it the amount you are budgeting for the sled, AND all the incidentals you will need to ensure trail readiness? If you buy a $4500 2003 RX1 for example, it will be reliable as is (if you find an honest seller). If you find a $2500 2002 SRX, you will be remiss by taking it on the trail without spending time and money, checking/correcting; pistons/rings, reeds, crank seals, power valves and power valve cables, etc.
One responder actually addressed the scenario that if your budget is fixed and not easily augmented, then snowmobiling is probably not your next thing because it IS EXPENSIVE.
Respectfully Always,
Jim from Canton (AKA "Lou")