No problem and this will for sure save you some cash. My wife rides a Specialized Sirrus Sport Disc and the front shifting sucked. For the life of me I couldn't get it to shift properly and my LBS couldn't do much better. Then I realized I had a Shimano Tiagra ring set laying around so I put them on and instantly the shifting is perfect. Shimano has a bunch of patents on their ramps and pins system and the others are simply copying it as close as possible without violating the patent. What happens is it isn't as good. FSA is pretty good, Campy has their own system that works fine. Sugino (what was on the Sirrus) isn't so good IMO and apparently Truvativ doesn't quite have it either from a lot of what I have read. But since the BCD of your cranks is either 130 mm or 110 mm then you can get rings from Shimano or FSA and give them a shot. FSA Pro Road rings run like $30 each...the Shimano are a bit more depending ont he ones you get. For sure I would give that a shot first.
Some options:
http://aebike.com/page.cfm?PageID=30...ils&sku=CR5672
http://aebike.com/page.cfm?PageID=30...ils&sku=CR1763
http://aebike.com/page.cfm?PageID=30...ils&sku=CR4014
http://aebike.com/page.cfm?PageID=30...ils&sku=CR4016