I don't know if you are very experienced with your Boogie, or how often you play it. Always run through a check list to make sure that you have factored out any externalities that may be causing the noise. These would be your guitar, instrument cable, pickups, power supply, distance to amp, etc. If you have factored those out, then you can move to checking your amp out. Spend a lot of time playing it, at good volumes, and listen for changes. There are countless websites online telling you how to listen for and determine tube related issues. Most of the time, amp problems are tube related. Next, go to the amp and switch out tubes, while writing and recording your results. It helps to know what each preamp tube socket does as well, as this will help you better locate a potential source of problems.
Recall too that spring reverb, by nature, is noisy. There is little way around it. You will always have slight noise. Some amps and designs are better than others. If you have noise in tubes before the reverb tube, then the noise will be amplified through your reverb too. If your slight noise is a reverb related one, switch out the tube or try a 12at7.
Troubleshooting, while annoying, is helpful. You'll learn a lot about your amp in the long run and will become better adjusted to making any future diagnostics. Also, listen to Quentin Hope on Mesa's Youtube page. He uses a Stiletto and a Lonestar Classic. He uses reverb on the LS, but the Stiletto isn't loaded with 'verb and he gets a good amount of hum with his setup. Most of it is probably from his Strat, but I point this out because of the nature of tube amps. While some are quieter than others, some are a bit more finnicky. These are just the rules of the game. Check out his playing nevertheless. It should give you a good example in determining whether your issues are in the range of normal amp noise.
http://www.youtube.com/watch?v=ZmRBK1nXM9o
Listen from 0:30 and on, while he is talking.
