My wife and I currently have a queen size Simmons Beautyrest Classic Trinity Park Plush Firm Euro Top. The mattress is approximately 6 years old (I don't remember when we actually bought it but it has a manufactured date of 07/12/10). The issue is that both my wife and I haven't been sleeping well lately. She is being woken up numerous times during the night due to my tossing and turning. Sometimes I realize I'm doing it and other times I don't. When I do wake up during the night my shoulder/arm that I'm sleeping on (I'm a side sleeper) is very sore. I'm pretty sure the material in the pillow top has deteriorated and is causing pressure on my shoulder. Unfortunately a new mattress isn't in the budget at the moment so I'm looking to improve what we have. As of now I'm thinking of a latex topper or possibly performing "mattress surgery". Our budget is probably around $200. Any suggestions/advice?